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Borders are usually defined as geographical boundaries, imposed either by features such as oceans and terrain, or by political entities such as governments, sovereign states, federated states, and other subnational entities. Political borders can be established through warfare,
colonization Colonization, or colonisation, constitutes large-scale population movements wherein migrants maintain strong links with their, or their ancestors', former country – by such links, gain advantage over other inhabitants of the territory. When ...
, or mutual agreements between the political entities that reside in those areas; the creation of these agreements is called
boundary delimitation Boundary delimitation (or simply delimitation) is the drawing of boundaries, particularly of electoral precincts, Federated state, states, counties or other municipalities.
. Some borders—such as most states' internal administrative borders, or inter-state borders within the
Schengen Area The Schengen Area ( , ) is an area comprising 27 European countries that have officially abolished all passport and all other types of border control at their mutual borders. Being an element within the wider area of freedom, security and j ...
—are open and completely unguarded. Most external political borders are partially or fully controlled, and may be crossed legally only at designated border checkpoints; adjacent border zones may also be controlled.
Buffer zones A buffer zone is a neutral zonal area that lies between two or more bodies of land, usually pertaining to countries. Depending on the type of buffer zone, it may serve to separate regions or conjoin them. Common types of buffer zones are demili ...
may be setup on borders between belligerent entities to lower the risk of escalation. While ''border'' refers to the boundary itself, the area around the border is called the
frontier A frontier is the political and geographical area near or beyond a boundary. A frontier can also be referred to as a "front". The term came from French in the 15th century, with the meaning "borderland"—the region of a country that fronts o ...
.


History

In the
pre-modern The term premodern refers to the period in human history immediately preceding the modern era, as well as the conceptual framework in the humanities and social sciences relating to the artistic, literary and philosophical practices which preceded t ...
world, the term ''border'' was vague and could refer to either side of the boundary, thus it was necessary to specify part of it with ''borderline'' or ''borderland''. During the medieval period the government's control frequently diminished the further people got from the
capital Capital may refer to: Common uses * Capital city, a municipality of primary status ** List of national capital cities * Capital letter, an upper-case letter Economics and social sciences * Capital (economics), the durable produced goods used f ...
. Therefore borderland (especially impassable terrain) attracted many
outlaw An outlaw, in its original and legal meaning, is a person declared as outside the protection of the law. In pre-modern societies, all legal protection was withdrawn from the criminal, so that anyone was legally empowered to persecute or kill them ...
s, as they often found sympathizers. In the past, many borders were not clearly defined lines; instead there were often intervening areas often claimed and fought over by both sides, sometimes called marchlands. Special cases in modern times were the Saudi Arabian–Iraqi neutral zone from 1922 to 1991 and the
Saudi Arabian–Kuwaiti neutral zone The Saudi Arabian–Kuwaiti neutral zone, also known as the Divided Zone, was an area of between the borders of Saudi Arabia and Kuwait that was left undefined when the border was established by the Uqair Convention of 2 December 1922. According ...
from 1922 until 1970. In modern times, marchlands have been replaced by clearly defined and demarcated borders. For the purposes of
border control Border control refers to measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it a ...
, airports and seaports are also classed as borders. Most countries have some form of border control to regulate or limit the movement of people, animals, and goods into and out of the country. Under international law, each country is generally permitted to legislate the conditions that have to be met in order to cross its borders, and to prevent people from crossing its borders in violation of those laws. Some borders require presentation of legal paperwork like
passport A passport is an official travel document issued by a government that contains a person's identity. A person with a passport can travel to and from foreign countries more easily and access consular assistance. A passport certifies the personal ...
s and visas, or other
identity document An identity document (also called ID or colloquially as papers) is any documentation, document that may be used to prove a person's identity. If issued in a small, standard credit card size form, it is usually called an identity card (IC, ID c ...
s, for persons to cross borders. To stay or work within a country's borders
aliens Alien primarily refers to: * Alien (law), a person in a country who is not a national of that country ** Enemy alien, the above in times of war * Extraterrestrial life, life which does not originate from Earth ** Specifically, intelligent extrate ...
(foreign persons) may need special immigration documents or permits; but possession of such documents does not guarantee that the person should be allowed to cross the border. Moving goods across a border often requires the payment of
excise tax file:Lincoln Beer Stamp 1871.JPG, upright=1.2, 1871 U.S. Revenue stamp for 1/6 barrel of beer. Brewers would receive the stamp sheets, cut them into individual stamps, cancel them, and paste them over the Bunghole, bung of the beer barrel so when ...
, often collected by
customs Customs is an authority or agency in a country responsible for collecting tariffs and for controlling the flow of goods, including animals, transports, personal effects, and hazardous items, into and out of a country. Traditionally, customs ...
officials. Animals (and occasionally humans) moving across borders may need to go into quarantine to prevent the spread of exotic infectious diseases. Most countries prohibit carrying illegal drugs or endangered animals across their borders. Moving goods, animals, or people illegally across a border, without declaring them or seeking permission, or deliberately evading official inspection, constitutes
smuggling Smuggling is the illegal transportation of objects, substances, information or people, such as out of a house or buildings, into a prison, or across an international border, in violation of applicable laws or other regulations. There are various ...
. Controls on car liability insurance validity and other formalities may also take place. In places where smuggling, migration, and infiltration are a problem, many countries fortify borders with fences and barriers, and institute formal
border control Border control refers to measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it a ...
procedures. These can extend inland, as in the United States where the
U.S. Customs and Border Protection United States Customs and Border Protection (CBP) is the largest federal law enforcement agency of the United States Department of Homeland Security. It is the country's primary border control organization, charged with regulating and facilit ...
service has jurisdiction to operate up to 100 miles from any land or sea boundary. On the other hand, some borders are merely signposted. This is common in countries within the European
Schengen Area The Schengen Area ( , ) is an area comprising 27 European countries that have officially abolished all passport and all other types of border control at their mutual borders. Being an element within the wider area of freedom, security and j ...
and on rural sections of the
Canada–United States border The border between Canada and the United States is the longest international border in the world. The terrestrial boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is long. The land border has two sections: Can ...
. Borders may even be completely unmarked, typically in remote or forested regions; such borders are often described as "porous". Migration within territorial borders, and outside of them, represented an old and established pattern of movement in African countries, in seeking work and food, and to maintain ties with kin who had moved across the previously porous borders of their homelands. When the colonial frontiers were drawn, Western countries attempted to obtain a monopoly on the recruitment of labor in many African countries, which altered the practical and institutional context in which the old migration patterns had been followed, and some might argue, are still followed today. The frontiers were particularly porous for the physical movement of migrants, and people living in borderlands easily maintained transnational cultural and social networks. A border may have been: * Agreed by the countries on both sides * Imposed by the country on one side * Imposed by third parties, e.g. an international conference * Inherited from a former state, colonial power or aristocratic territory * Inherited from a former internal border, such as within the former Soviet Union * Never formally defined. In addition, a border may be a ''de facto'' military ceasefire line.


Classification


Political borders

Political borders are imposed on the world through human agency. That means that although a political border may follow a river or mountain range, such a feature does not automatically define the political border, even though it may be a major physical barrier to crossing. Political borders are often classified by whether or not they follow conspicuous physical features on the earth.


Natural borders

Natural borders are geographical features that present natural obstacles to communication and transport. Existing political borders are often a formalization of such historical, natural obstacles. Some geographical features that often constitute natural borders are: * Oceans: oceans create very costly natural borders. Very few countries span more than one continent. Only very large and resource-rich states are able to sustain the costs of governance across oceans for longer periods of time. * Rivers: some political borders have been formalized along natural borders formed by rivers. Some examples are: the
Niagara River The Niagara River () is a river that flows north from Lake Erie to Lake Ontario. It forms part of the border between the province of Ontario in Canada (on the west) and the state of New York (state), New York in the United States (on the east) ...
(Canada–U.S), the
Rio Grande The Rio Grande ( and ), known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers (along with the Colorado River) in the southwestern United States and in northern Mexico. The length of the Rio G ...
(Mexico–U.S.), the Rhine (France–Germany), and the Mekong (Thailand–Laos). If a precise line is desired, it is often drawn along the thalweg, the deepest line along the river. In the Hebrew Bible,
Moses Moses hbo, מֹשֶׁה, Mōše; also known as Moshe or Moshe Rabbeinu (Mishnaic Hebrew: מֹשֶׁה רַבֵּינוּ, ); syr, ܡܘܫܐ, Mūše; ar, موسى, Mūsā; grc, Mωϋσῆς, Mōÿsēs () is considered the most important pro ...
defined the middle of the
river Arnon Wadi Mujib ( ar, وادي الموجب, ''Wadi el-Mujib''), also known as Arnon Stream (Hebrew: נַחַל ארנון), is a river in Jordan. The river empties into the Dead Sea circa below sea level. Today, Wadi Mujib is fed by seven tributa ...
as the border between
Moab Moab ''Mōáb''; Assyrian: 𒈬𒀪𒁀𒀀𒀀 ''Mu'abâ'', 𒈠𒀪𒁀𒀀𒀀 ''Ma'bâ'', 𒈠𒀪𒀊 ''Ma'ab''; Egyptian: 𓈗𓇋𓃀𓅱𓈉 ''Mū'ībū'', name=, group= () is the name of an ancient Levantine kingdom whose territo ...
and the Israelite tribes settling east of the Jordan (). The United States Supreme Court ruled in 1910 that the boundary between the American states of Maryland and West Virginia is the south bank of the Potomac River. * Lakes: larger lakes create natural borders. Examples are
Lake Tanganyika Lake Tanganyika () is an African Great Lake. It is the second-oldest freshwater lake in the world, the second-largest by volume, and the second-deepest, in all cases after Lake Baikal in Siberia. It is the world's longest freshwater lake. ...
, with the Democratic Republic of the Congo and Zambia on its west shore and Tanzania and
Burundi Burundi (, ), officially the Republic of Burundi ( rn, Repuburika y’Uburundi ; Swahili language, Swahili: ''Jamuhuri ya Burundi''; French language, French: ''République du Burundi'' ), is a landlocked country in the Great Rift Valley at the ...
on the east; and the Great Lakes which form a substantial part of the border between Canada and the United States. * Forests: denser jungles or forests can create strong natural borders. One example of a natural forest border is the
Amazon rainforest The Amazon rainforest, Amazon jungle or ; es, Selva amazónica, , or usually ; french: Forêt amazonienne; nl, Amazoneregenwoud. In English, the names are sometimes capitalized further, as Amazon Rainforest, Amazon Forest, or Amazon Jungle. ...
, separating Brazil and
Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...
from Peru,
Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...
, Venezuela and
Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...
. * Mountain ranges: Many nations have their political borders defined along mountain ranges, often along a
drainage divide A drainage divide, water divide, ridgeline, watershed, water parting or height of land is elevated terrain that separates neighboring drainage basins. On rugged land, the divide lies along topographical ridges, and may be in the form of a singl ...
. Examples are the Pyrenees, which have separated Spain and France or their forerunners for millennia; the Andes separating Chile and Argentina; and the Alps separating Italy, France,
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, Germany and others. Throughout history, technological advances have reduced the costs of transport and communication across the natural borders. That has reduced the significance of natural borders over time. As a result, political borders that have been formalized more recently, such as those in Africa or Americas, typically conform less to natural borders than very old borders, such as those in Europe or Asia, do.


Landscape borders

A landscape border is a mixture of political and natural borders. One example is the defensive forest created by China's Song Dynasty in the eleventh century. Such a border is political in the sense that it is human-demarcated, usually through a treaty. However, a landscape border is not demarcated by fences and walls but instead landscape features such as forests, mountains, and water bodies. It is different from a natural border, however, in the sense that the border landscape is not natural but human-engineered. Such a landscape usually differs from the borderland's natural geography and its building requires tremendous human labour and financial investment.


Geometric borders

Geometric boundaries are formed by straight lines (such as lines of latitude or longitude), or occasionally arcs (Pennsylvania/Delaware), regardless of the physical and cultural features of the area. Such political boundaries are often found around the states that developed out of colonial holdings, such as in
North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
, Africa and the Middle East. The
Canada–United States border The border between Canada and the United States is the longest international border in the world. The terrestrial boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is long. The land border has two sections: Can ...
follows the 49th parallel for roughly from
Lake of the Woods Lake of the Woods (french: Lac des Bois, oj, Pikwedina Sagainan) is a lake occupying parts of the Canadian provinces of Ontario and Manitoba and the U.S. state of Minnesota. Lake of the Woods is over long and wide, containing more than 14,55 ...
( Ontario and Minnesota) west to the Pacific Ocean.


Fiat borders

A generalization of the idea of geometric borders is the idea of
fiat Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary ...
boundaries by which is meant any sort of boundary that does not track an underlying ''bona fide'' physical discontinuity (''fiat'', latin for “let it be done”, a decision). Fiat boundaries are typically the product of human demarcation, such as in demarcating electoral districts or postal districts.


Relic borders

A relic border is a former boundary, which may no longer be a legal boundary at all. However, the former presence of the boundary can still be seen in the landscape. For instance, the boundary between East and West Germany is no longer an international boundary, but it can still be seen because of historical markers on the landscape; it remains a cultural and economic demarcation in Germany. Other examples include the Demilitarized Zone between North and
South Vietnam South Vietnam, officially the Republic of Vietnam ( vi, Việt Nam Cộng hòa), was a state in Southeast Asia that existed from 1955 to 1975, the period when the southern portion of Vietnam was a member of the Western Bloc during part of th ...
(defunct since 1975) and the border between North and
South Yemen South Yemen ( ar, اليمن الجنوبي, al-Yaman al-Janubiyy), officially the People's Democratic Republic of Yemen (, ), also referred to as Democratic Yemen (, ) or Yemen (Aden) (, ), was a communist state that existed from 1967 to 19 ...
(defunct since 1990). Occasionally a relic border is reconstituted in some form, for example the border between
British Somaliland British Somaliland, officially the Somaliland Protectorate ( so, Dhulka Maxmiyada Soomaalida ee Biritishka), was a British Empire, British protectorate in present-day Somaliland. During its existence, the territory was bordered by Italian Soma ...
and Italian Somaliland ceased to exist when the two colonies merged to form the independent state of Somalia in 1960, however when the former British Somaliland declared independence in 1991 it claimed the former British-Italian line as its eastern border.


Lines of Control

A
line of control The Line of Control (LoC) is a military control line between the Indian and Pakistanicontrolled parts of the former princely state of Jammu and Kashmir—a line which does not constitute a legally recognized international boundary, but serve ...
(LoC) refers to a militarized buffer border between two or more nations that has yet to achieve permanent border status. LoC borders are typically under military control and are not recognized as an official international border. Formally known as a cease-fire line, an LoC was first created with the Simla Agreement between India and Pakistan. Similar to a cease-fire line, an LoC is typically the result of war, military stalemates and unresolved land ownership conflict.


Maritime borders

A maritime border is a division enclosing an area in the ocean where a nation has exclusive rights over the mineral and biological resources, encompassing maritime features, limits and zones. Maritime borders represent the jurisdictional borders of a
maritime nation A maritime nation is any nation that borders the sea and is dependent on its use for the majority of the following state activities: commerce and transport, war, to define a territorial boundary, or for any maritime activity (activities using the s ...
and are recognized by the United Nations Convention on the Law of the Sea. Maritime borders exist in the context of territorial waters,
contiguous zone The term territorial waters is sometimes used informally to refer to any area of water over which a sovereign state has jurisdiction, including internal waters, the territorial sea, the contiguous zone, the exclusive economic zone, and potenti ...
s, and exclusive economic zones; however, the terminology does not encompass lake or river boundaries, which are considered within the context of land boundaries. Some maritime borders have remained indeterminate despite efforts to clarify them. This is explained by an array of factors, some of which illustrate regional problems.


Airspace borders

Airspace Airspace is the portion of the atmosphere controlled by a country above its territory, including its territorial waters or, more generally, any specific three-dimensional portion of the atmosphere. It is not the same as aerospace, which is the ...
is the
atmosphere An atmosphere () is a layer of gas or layers of gases that envelop a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A s ...
located within a country's controlled international and maritime borders. All
sovereign countries The following is a list providing an overview of sovereign states around the world with information on their status and recognition of their sovereignty. The 206 listed states can be divided into three categories based on membership withi ...
hold the right to regulate and protect air space under the international law of Air sovereignty. The horizontal boundaries of airspace are similar to the policies of " high seas" in maritime law. Airspace extends 12 nautical miles from the coast of a country and it holds responsibility for protecting its own airspace unless under NATO peacetime protection. With international agreement a country can assume the responsibility of protecting or controlling the atmosphere over International Airspaces such as the Pacific Ocean. The vertical boundaries of airspace are not officially set or regulated internationally. However, there is a general agreement of vertical airspace ending at the point of the
Kármán line The Kármán line (or von Kármán line ) is an attempt to define a boundary between Earth's atmosphere and outer space, and offers a specific definition set by the Fédération aéronautique internationale (FAI), an international record-keeping ...
. The Kármán line is a peak point at the altitude of 62 mi (100 km) above the Earth's surface, setting a boundary between the atmosphere (airspace) and outer space (which is governed by space law).


Frontier

The frontier is a border that is open-ended to one side, identifying an expanding borderland to one side. This type of border can be fairly abstract and has been identified as a particular state of mind for human activity. As such frontiers have been applied to borderlands identifying and claiming them as terra nullius.


Types of border regulation


Regulated borders

Regulated borders have varying degrees of control on the movement of persons and trade between nations and jurisdictions. Most Industrialized nations have regulations on entry and require one or more of the following procedures: visa check,
passport A passport is an official travel document issued by a government that contains a person's identity. A person with a passport can travel to and from foreign countries more easily and access consular assistance. A passport certifies the personal ...
check or
customs Customs is an authority or agency in a country responsible for collecting tariffs and for controlling the flow of goods, including animals, transports, personal effects, and hazardous items, into and out of a country. Traditionally, customs ...
checks. Most regulated borders have regulations on immigration, types of wildlife and plants, and illegal objects such as drugs or weapons. Overall border regulations are placed by national and local governments and can vary depending on nation and current political or economic conditions. Some of the most regulated borders in the world include:
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
, the United States, Israel, Canada, the United Kingdom, and the United Arab Emirates. These nations have government-controlled border agencies and organizations that enforce border regulation policies on and within their borders.


Open borders

An open border is the deregulation and or lack of regulation on the movement of persons between nations and jurisdictions. This definition does not apply to trade or movement between privately owned land areas. Most nations have open borders for travel within their nation of travel, though more authoritarian states may limit the freedom of internal movement of its citizens, as for example in the former USSR. However, only a handful of nations have deregulated open borders with other nations, an example of this being European countries under the Schengen Agreement or the open Belarus-Russia border. Open borders used to be very common amongst all nations, however this became less common after the First World War, which led to the regulation of open borders, making them less common and no longer feasible for most industrialized nations.


Demilitarized zones

A demilitarized zone (DMZ) is a border separating two or more nations, groups or militaries that have agreed to prohibit the use of military activity or force within the border's bounds. A DMZ can act as a war boundary, ceasefire line,
wildlife preserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological or o ...
, or a ''de facto'' international border. An example of a demilitarized international border is the 38th parallel between North and South Korea. Other notable DMZ zones include Antarctica and outer space (consisting of all space 100 miles away from the earth's surface), both are preserved for world research and exploration. The prohibition of control by nations can make a DMZ unexposed to human influence and thus developed into a natural border or wildlife preserve, such as on the Korean Demilitarized Zone, the Vietnamese Demilitarized Zone, and the Green Line in Cyprus.


Border economics

Borders undermine economic activity and development by reducing trade activity. The presence of borders often fosters certain economic features or anomalies. Wherever two jurisdictions come into contact, special economic opportunities arise for border trade.
Smuggling Smuggling is the illegal transportation of objects, substances, information or people, such as out of a house or buildings, into a prison, or across an international border, in violation of applicable laws or other regulations. There are various ...
provides a classic case; contrariwise, a border region may flourish on the provision of excise or of
import An import is the receiving country in an export from the sending country. Importation and exportation are the defining financial transactions of international trade. In international trade, the importation and exportation of goods are limited ...
export services — legal or quasi-legal, corrupt or legitimate. Different regulations on either side of a border may encourage services to position themselves at or near that border: thus the provision of
pornography Pornography (often shortened to porn or porno) is the portrayal of sexual subject matter for the exclusive purpose of sexual arousal. Primarily intended for adults,
, of
prostitution Prostitution is the business or practice of engaging in Sex work, sexual activity in exchange for payment. The definition of "sexual activity" varies, and is often defined as an activity requiring physical contact (e.g., sexual intercourse, n ...
, of
alcohol Alcohol most commonly refers to: * Alcohol (chemistry), an organic compound in which a hydroxyl group is bound to a carbon atom * Alcohol (drug), an intoxicant found in alcoholic drinks Alcohol may also refer to: Chemicals * Ethanol, one of sev ...
, fireworks, and/or of
narcotics The term narcotic (, from ancient Greek ναρκῶ ''narkō'', "to make numb") originally referred medically to any psychoactive compound with numbing or paralyzing properties. In the United States, it has since become associated with opiates ...
may cluster around borders, city limits, county lines, ports and airports. In a more planned and official context, Special Economic Zones (SEZs) often tend to cluster near borders or ports. Even if the goods are not perceived to be undesirable, states will still seek to document and regulate the cross-border trade in order to collect tariffs and benefit from foreign currency exchange revenues. Thus, there is the concept unofficial trade in goods otherwise legal; for example, the cross-border trade in livestock by pastoralists in the
Horn of Africa The Horn of Africa (HoA), also known as the Somali Peninsula, is a large peninsula and geopolitical region in East Africa.Robert Stock, ''Africa South of the Sahara, Second Edition: A Geographical Interpretation'', (The Guilford Press; 2004), ...
. Ethiopia sells an estimated $250 to $300 million of livestock to Somalia, Kenya and Djibouti every year unofficially, over 100 times the official estimate. Human economic traffic across borders (apart from
kidnapping In criminal law, kidnapping is the unlawful confinement of a person against their will, often including transportation/asportation. The asportation and abduction element is typically but not necessarily conducted by means of force or fear: the p ...
) may involve mass commuting between workplaces and residential settlements. The removal of internal barriers to commerce, as in France after the French Revolution or in Europe since the 1940s, de-emphasizes border-based economic activity and fosters free trade.
Euroregion In European politics, the term Euroregion usually refers to a transnational co-operation structure between two (or more) contiguous territories located in different European countries. Euroregions represent a specific type of cross-border region. ...
s are similar official structures built around commuting across boundary.


Politics

Political borders have a variety of meanings for those whom they affect. Many borders in the world have
checkpoints Checkpoint may refer to: Places * Border checkpoint, a place on the land border between two states where travellers and/or goods are inspected * Security checkpoint, erected and enforced within contiguous areas under military or paramilitary cont ...
where
border control Border control refers to measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it a ...
agents inspect persons and/or goods crossing the boundary. In much of Europe, controls on persons were abolished by the 1985 Schengen Agreement and subsequent European Union legislation. Since the Treaty of Amsterdam, the competence to pass laws on crossing internal and external borders within the European Union and the associated
Schengen Area The Schengen Area ( , ) is an area comprising 27 European countries that have officially abolished all passport and all other types of border control at their mutual borders. Being an element within the wider area of freedom, security and j ...
states ( Iceland, Norway,
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, and Liechtenstein) lies exclusively within the jurisdiction of the European Union, except where states have used a specific right to opt out (United Kingdom and Ireland, which maintain the Common Travel Area amongst themselves). The United States has notably increased measures taken in border control on the
Canada–United States border The border between Canada and the United States is the longest international border in the world. The terrestrial boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is long. The land border has two sections: Can ...
and the United States–Mexico border during its War on Terrorism (See Shantz 2010). One American writer has said that the US-Mexico border is probably "the world's longest boundary between a
First World The concept of First World originated during the Cold War and comprised countries that were under the influence of the United States and the rest of NATO and opposed the Soviet Union and/or communism during the Cold War. Since the collapse of ...
and Third World country". Historic borders such as the Great Wall of China, the
Maginot Line The Maginot Line (french: Ligne Maginot, ), named after the French Minister of War André Maginot, is a line of concrete fortifications, obstacles and weapon installations built by France in the 1930s to deter invasion by Germany and force the ...
, and
Hadrian's Wall Hadrian's Wall ( la, Vallum Aelium), also known as the Roman Wall, Picts' Wall, or ''Vallum Hadriani'' in Latin, is a former defensive fortification of the Roman province of Britannia, begun in AD 122 in the reign of the Emperor Hadrian. R ...
have played a great many roles and been marked in different ways. While the stone walls, the Great Wall of
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
and the Roman Hadrian's Wall in Britain had military functions, the entirety of the Roman borders were very porous, which encouraged Roman economic activity with neighbors. On the other hand, a border like the Maginot Line was entirely military and was meant to prevent any access in what was to be World War II to France by its neighbor, Germany; Germany ended up going around the Maginot Line through Belgium just as it had done in World War I.


Border conflict

Border conflicts or the potential of such are the reason why many borders feature fortifications and zoning like
no man's land No man's land is waste or unowned land or an uninhabited or desolate area that may be under dispute between parties who leave it unoccupied out of fear or uncertainty. The term was originally used to define a contested territory or a dump ...
s, demilitarized zones,
demarcation line {{Refimprove, date=January 2008 A political demarcation line is a geopolitical border, often agreed upon as part of an armistice or ceasefire. Africa * Moroccan Wall, delimiting the Moroccan-controlled part of Western Sahara from the Sahrawi- ...
s and
buffer zone A buffer zone is a neutral zonal area that lies between two or more bodies of land, usually pertaining to countries. Depending on the type of buffer zone, it may serve to separate regions or conjoin them. Common types of buffer zones are demil ...
s.


Border construction and crossings

Borders have sometimes been significantly shaped by physical border constructions and openings. From border crossings, over border markers to border barriers these constructions fulfill many different functions. Such as also providing crossover.


Crossings and transition

Even the most fortified borders reserve specific places to allow crossing. The many forms of borders have different ways of enabling and controlling passage.


Movement and permeability

Borders can have an significant impact on and function for movement. It can enable and stop movement, across as well as along borders. The permeability of borders depends on its construction, availability of crossings, regulation and types or scope of activity. The permeability can vary, borders can be barriers for humans, but also for animal migration or types of pollution.


Overlap and cooperation

Borders facilitate or block hybrids like border overlap and cooperation beyond mere encounter and exchange.


Cross-border regions

Macro-regional integration initiatives, such as the European Union and NAFTA, have spurred the establishment of cross-border regions. These are initiatives driven by local or regional authorities, aimed at dealing with local border-transcending problems such as transport and environmental degradation. Many cross-border regions are also active in encouraging
intercultural communication Intercultural communication is a discipline that studies communication across different cultures and social groups, or how culture affects communication. It describes the wide range of communication processes and problems that naturally appear w ...
and dialogue as well as cross-border economic development strategies.
In Europe, the European Union provides financial support to cross-border regions via its Interreg programme. The Council of Europe has issued the Outline Convention on Transfrontier Co-operation, providing a legal framework for cross-border co-operation even though it is in practice rarely used by Euroregions.


Border studies

There has been a renaissance in the study of borders starting with the end of the 1990s, partially from the creation of a counter-narrative to the discourse about the world becoming a borderless and deterritorialized place, which has accompanied theories about globalization. Examples of recent initiatives are the Border Regions in Transition network of scholars, the International Boundaries Research Unit at the University of Durham, the Association for Borderlands Studies based in
North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
, the African Borderlands Research Network and the founding of smaller border research centres at
Nijmegen Nijmegen (;; Spanish and it, Nimega. Nijmeegs: ''Nimwèège'' ) is the largest city in the Dutch province of Gelderland and tenth largest of the Netherlands as a whole, located on the Waal river close to the German border. It is about 6 ...
and
Queen's University Belfast , mottoeng = For so much, what shall we give back? , top_free_label = , top_free = , top_free_label1 = , top_free1 = , top_free_label2 = , top_free2 = , established = , closed = , type = Public research university , parent = ...
.


Border art

* Border art is a contemporary art practice rooted in the socio-political experience(s), such as of those on the U.S.-Mexico borderlands, or ''frontera''. Since its conception in the mid-80's, this artistic practice has assisted in the development of questions surrounding homeland, borders,
surveillance Surveillance is the monitoring of behavior, many activities, or information for the purpose of information gathering, influencing, managing or directing. This can include observation from a distance by means of electronic equipment, such as c ...
, identity, race,
ethnicity An ethnic group or an ethnicity is a grouping of people who identify with each other on the basis of shared attributes that distinguish them from other groups. Those attributes can include common sets of traditions, ancestry, language, history, ...
, and national origin(s). Border art as a conceptual artistic practice, however, opens up the possibility for artists to explore similar concerns of identity and national origin(s) but whose location is not specific to the U.S-Mexico border. A border can be a division, dividing groups of people and families. Borders can include but are not limited to language, culture, social and economic class, religion, and national identity. In addition to a division, a border can also conceive a borderland area that can create a cohesive community separate from the mainstream cultures and identities portrayed in the communities away from the borders, such as the Tijuana-San Diego border between Mexico and the United States. Border art can be defined as an art that is created in reference to any number of physical or imagined boundaries. This art can but is not limited to social, political, physical, emotional and/or nationalist issues. Border art is not confined to one particular medium. Border art/artists often address the forced politicization of human bodies and physical land and the arbitrary, yet incredibly harmful, separations that are created by these borders and boundaries. These artists are often "border crossers" themselves. They may cross borders of traditional art-making (through performance, video, or a combination of mediums). They may at once be artists and activists, existing in multiple social roles at once. Many border artists defy easy classifications in their artistic practice and work.


Images gallery

The following pictures show in how many different ways international and regional borders can be closed off, monitored, at least marked as such, or simply unremarkable. File:International border at Wagah - evening flag lowering ceremony.jpg, The Wagah border crossing between India and Pakistan along the Radcliffe Line. File:Tijuana-san diego border deaths.jpg, Border at Tijuana, Mexico and
San Ysidro San Ysidro (Spanish for " St. Isidore", ) is a district of the City of San Diego, immediately north of the Mexico–United States border. It neighbors Otay Mesa West to the north, Otay Mesa to the east, and Nestor and the Tijuana River Valley t ...
, California, United States with memorial coffins for those killed crossing this border. A straight-line border surveyed when the region was thinly populated. File:Lo Wu Restricted Area Sign.JPG, A sign showing the limits of the Frontier Closed Area, a 28-km2 area along the Hong Kong-side of the 30-km-long border between Hong Kong and mainland China. File:Karigasniemi Finland Bridge over Inarijoki.jpg, The bridge over the Anarjohka in Karigasniemi, on the border of Finland with Norway File:Argentina-Brazil border.jpg, The border between Argentina (
Puerto Iguazú Puerto Iguazú is a border city in the province of Misiones, Argentina. With a population of 82,227 (), it is the fourth largest city in the Province, after Posadas, Oberá, and Eldorado. The world-renowned Iguazú Falls are only away from ...
) and Brazil (
Foz do Iguazú Foz () is a town and municipality in the A Mariña Central comarca in the Galician province of Lugo. It has been historically linked to the Ancient Province of Mondoñedo and also linked to the arrival of Briton immigrants during the Dark Age ...
) on the
Iguazú River __NOTOC__ The Iguazu River ( pt, Rio Iguaçu, br , es, Río Iguazú} ), also called Rio Iguassu, is a river in Brazil and Argentina. It is an important tributary of the Paraná River. The Iguazu River is long, with a drainage basin of . Cour ...
. Paraguay ( Ciudad del Este) is in the background. File:Peace Arch, U.S.-Canada border.jpg, The Peace Arch at the
Canada–United States border The border between Canada and the United States is the longest international border in the world. The terrestrial boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is long. The land border has two sections: Can ...
, the longest common border in the world. File:Grenzüberschreitender Wanderweg.jpg, A sign at the
Polish Polish may refer to: * Anything from or related to Poland, a country in Europe * Polish language * Poles, people from Poland or of Polish descent * Polish chicken *Polish brothers (Mark Polish and Michael Polish, born 1970), American twin screenwr ...
- Czech border near Králický Sněžník, indicating that only citizens of the European Union and of five more states may cross. When the
Schengen The Schengen Area ( , ) is an area comprising 27 European countries that have officially abolished all passport and all other types of border control at their mutual borders. Being an element within the wider area of freedom, security and j ...
rules became applicable in 2007, the sign became obsolete. File:OffeneGrenzeNiederndorf-Oberaudorf.jpg, A typical
Schengen The Schengen Area ( , ) is an area comprising 27 European countries that have officially abolished all passport and all other types of border control at their mutual borders. Being an element within the wider area of freedom, security and j ...
internal border (near Kufstein between Germany and Austria): the traffic island marks the spot where a control post once stood; it was removed in 2000. File:Border flower pot.jpg, Self-illuminating Border flower pot between Burghausen, Salzach in Germany and Ach in Austria. File:GrenzeVaalsMitteRoteLinie.JPG, A border within a closely built-up area – near
Aachen Aachen ( ; ; Aachen dialect: ''Oche'' ; French and traditional English: Aix-la-Chapelle; or ''Aquisgranum''; nl, Aken ; Polish: Akwizgran) is, with around 249,000 inhabitants, the 13th-largest city in North Rhine-Westphalia, and the 28th- ...
between Germany and the Netherlands: Germany starts at the red line drawn in the photo. File:Baarle-Nassau frontière café.jpg, Border between the Netherlands and Belgium next to a street café in
Baarle Nassau Baarle-Nassau () is a municipality and town in the southern Netherlands, located in the province of North Brabant. It had a population of in . The town is the site of a complicated borderline between Belgium and the Netherlands, with 22 small ...
and
Baarle Hertog (; french: Baerle-Duc, ) is a Flemish municipality of Belgium, much of which consists of a number of small Belgian enclaves fully surrounded by the Netherlands. Parts of are surrounded by the Dutch province of North Brabant, but it is part of ...
. Some European borders originate from former land ownership boundaries. File:EBC-Grenze.JPG, The metal strip within the building of the ''Eurode Business Centre'' marks the border between the Netherlands and Germany, in Kerkrade and Herzogenrath. File:Neustrasse, Herzogenrath.jpg, The border between the Netherlands (right) and Germany (left) is located in the center of this residential road, and, nowadays, completely unmarked. File:Border stone.JPG, Italy/Switzerland border stone at
Passo San Giacomo The San Giacomo Pass (Italian: ''Passo San Giacomo'') is an Alpine pass connecting Switzerland and Italy. It connects Bedretto on its northern side (valley of Leventina) to Formazza on its southern side. The pass is located between the Grieshorn ...
. Some borders were broadly defined by treaty, and surveyors would then choose a suitable line on the ground. File:Puente sobre el Guadiana.JPG, Guadiana International Bridge at the Portugal-Spain border, whose limits were established by the
Treaty of Alcañices The Treaty of Alcañices ( pt, Tratado de Alcanizes; es, Tratado de Alcañices) was made in Alcañices between King Denis of Portugal and King Fernando IV of Castile in 1297. Denis was the grandson of King Alfonso X of Castile and essentially an ...
in 1297. It is one of the oldest borders in the world. File:Treriks.jpg, The Treriksröset
cairn A cairn is a man-made pile (or stack) of stones raised for a purpose, usually as a marker or as a burial mound. The word ''cairn'' comes from the gd, càrn (plural ). Cairns have been and are used for a broad variety of purposes. In prehis ...
located at the point where Sweden, Norway and Finland meet. File:Indonesia-Timor Leste border.jpg, The gate that borders East Nusa Tenggara in Indonesia and East Timor. File:USCanadaBorderByPhilKonstantin.jpg, The marker between the United States and Canada in Waterton-Glacier National Park. File:The Border on Killeen School Road - geograph.org.uk - 446719.jpg, A road crossing the Republic of Ireland-United Kingdom border from the British side. This border is entirely open: the only indication that one is crossing into the Republic of Ireland is a speed limit sign in kilometers per hour (signs in the United Kingdom are in miles per hour). File:China - Russia Railway.jpg, A train crossing the China–Russia border, travelling from Zabaykalsk in Russia to Manzhouli in China. File:India-Pakistan Border at Night.jpg, The winding border between Pakistan and India is lit by security lights. It is one of the few places on Earth where an international boundary can be seen at night. File:Hadrian's wall at Greenhead Lough.jpg, A section of
Hadrian's Wall Hadrian's Wall ( la, Vallum Aelium), also known as the Roman Wall, Picts' Wall, or ''Vallum Hadriani'' in Latin, is a former defensive fortification of the Roman province of Britannia, begun in AD 122 in the reign of the Emperor Hadrian. R ...
marking the border of Roman Britain


See also

* Border barrier *
Border control Border control refers to measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it a ...
*
Border irregularities of the United States Border irregularities of the United States, particularly panhandles and highway incursions into other jurisdictions, are shown here. Often they are a result of borders which do not conform to geological features such as changes in the course of a ...
*
Borders of the Roman Empire The borders of the Roman Empire, which fluctuated throughout the empire's history, were realised as a combination of military roads and linked forts, natural frontiers (most notably the Rhine and Danube rivers) and man-made fortifications which ...
*
Boundaries between the continents of Earth Determining the boundaries between the continents of Earth is generally a matter of geographical convention. Several slightly different conventions are in use. The number of continents is most commonly considered seven (in English-speaking cou ...
*
Boundary delimitation Boundary delimitation (or simply delimitation) is the drawing of boundaries, particularly of electoral precincts, Federated state, states, counties or other municipalities.
* Boundary (real estate) *
Enclave and exclave An enclave is a territory (or a small territory apart of a larger one) that is entirely surrounded by the territory of one other state or entity. Enclaves may also exist within territorial waters. ''Enclave'' is sometimes used improperly to deno ...
*
France–UK border The border between the countries of France and the United Kingdom in Europe is a maritime border that stretches along the Channel, the North Sea and the Atlantic Ocean. The Channel Tunnel links the two countries underground and is defined as a ' ...
*
Geopolitics Geopolitics (from Greek γῆ ''gê'' "earth, land" and πολιτική ''politikḗ'' "politics") is the study of the effects of Earth's geography (human and physical) on politics and international relations. While geopolitics usually refers to ...
* Illegal entry *
Illegal immigration Illegal immigration is the migration of people into a country in violation of the immigration laws of that country or the continued residence without the legal right to live in that country. Illegal immigration tends to be financially upwar ...
* Landlocked country * Limes (Roman Empire) * List of border conflicts * List of bordering countries with greatest relative differences in GDP (PPP) per capita * List of countries and territories by land borders * List of countries by land and maritime borders * List of countries that border only one other country *
List of divided islands This is a list of islands whose land is divided by one or more border, international borders. Sea islands Lake islands *''De facto'' between Russia (Crimea) (''Annexation of Crimea by the Russian Federation, disputed'') and Ukraine **Syvas ...
*
List of international river borders This is a List of international river borders. Rivers that form any portion of the border between two countries minimum: By region Africa 300px, Countries in Africa The following rivers form borders of countries in Africa: * Akanyaru River ...
* List of land borders with dates of establishment * List of national border changes from 1815 to 1914 * List of national border changes (1914–present) * List of territorial disputes * Maritime boundary *
Political geography Political geography is concerned with the study of both the spatially uneven outcomes of political processes and the ways in which political processes are themselves affected by spatial structures. Conventionally, for the purposes of analysis, po ...
* Political science *
Quadripoint A quadripoint is a point on Earth where four distinct territories meet. The territories can be of different types, such as national and provincial. In North America, several such places are commonly known as Four Corners. Several examples exist ...
*
Schengen Area The Schengen Area ( , ) is an area comprising 27 European countries that have officially abolished all passport and all other types of border control at their mutual borders. Being an element within the wider area of freedom, security and j ...
* Tripoint


References


Further reading

* *
The World in 2015: National borders undermined?
11-min video interview with Bernard Guetta, a columnist for Libération newspaper and France Inter radio. "For uetta one of the main lessons from international relations in 2014 is that national borders are becoming increasingly irrelevant. These borders, drawn by the colonial powers, were and still are entirely artificial. Now, people want borders along national, religious or ethnic lines. Bernard Guetta calls this a "comeback of real history"." * Baramova, Maria (2010)
''Border Theories in Early Modern Europe''EGO - European History Online
Mainz
Institute of European History
retrieved: March 25, 2021
pdf
. * * * Said Saddiki,

'. Cambridge, UK: Open Book Publishers, 2017. https://doi.org/10.11647/OBP.0121 * Struck, Bernhard
''Border Regions''EGO - European History Online
Mainz
Institute of European History
2013, retrieved: March 8, 2021
pdf
.


External links



* [https://web.archive.org/web/20080222234042/http://www.culture-routes.lu/php/fo_index.php?lng=en&back=%2Fphp%2Ffo_index.php%3Flng%3Den%26dest%3Dbd_ac_lst&dest=bd_ac_det&id=00002600 Institut Européen des Itinéraires Culturels homepage]
Border Ireland – database of activities and publications on cross-border co-operation on the island of Ireland since 1980's

Baltic Borderlands Greifswald
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