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Siege Of Otrar
The Otrar Catastrophe was a siege that took place between December 1219 and February 1220 during the Mongol conquest of the Khwarazmian Empire at Otrar, a large trading city on the Syr Darya river. Inalchuq, the city's governor, had seized the goods of a Mongol trade caravan the previous year; after more provocations from Inalchuq's liege and ruler of the Khwarazmian Empire, Shah Muhammad II, Genghis Khan launched a full-scale invasion of the empire. The city had been extensively garrisoned and fortified, and the Mongol troops found it difficult to breach the battlements. Progress was slowly made however, and by February Genghis felt confident enough to detach part of his army and head southwards towards Transoxiana. His sons Chagatai and Ogedai were left behind to continue the siege. Qaracha, the leading general of the city, deserted in February 1220 and the inner citadel fell soon afterwards. Inalchuq was captured alive, and was executed. Some sources relate that he was execut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongol Conquest Of The Khwarazmian Empire
The Mongol invasion of Khwarezmia ( fa, حمله مغول به خوارزمشاهیان) took place between 1219 and 1221, as troops of the Mongol Empire under Genghis Khan invaded the lands of the Khwarazmian Empire in Central Asia. The campaign, which followed the annexation of the Qara Khitai khanate, saw widespread devastation and atrocities, and marked the completion of the Mongol conquest of Central Asia, and began the Mongol conquest of Persia. Both belligerents, although large, had been formed recently: the Khwarazmian dynasty had expanded from their homeland to replace the Seljuk Empire in the late 1100s and early 1200s; near-simultaneously, Genghis Khan had unified the Mongolic peoples and conquered the Western Xia dynasty. Although relations were initially cordial, Genghis was angered by a series of diplomatic provocations. When a senior Mongol diplomat was executed by Khwarazmshah Muhammed II, the Khan mobilized his forces, estimated to be between 90,000 and 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siege Of Bukhara
The siege of Bukhara took place during the Mongol conquest of the Khwarazmian Empire, in March 1220. Genghis Khan, ruler of the Mongol Empire, had launched a multi-pronged assault on the Khwarazmian Empire, ruled by Shah Muhammad II. While the Shah planned to defend his major cities individually, the Mongols laid siege to the border town of Otrar, and struck further into Khwarazmia. The city of Bukhara was a major trading and cultural centre of the Khwarazmian Empire, but was located far from the border with the Mongol Empire, and so the Shah allocated fewer than 20,000 soldiers to defend it. However, a Mongol force, estimated to number between 30,000 and 50,000 men, managed to traverse the Kyzylkum Desert, previously thought to be impassable for large armies. Bukhara was caught completely by surprise, and after a failed sortie, the outer city surrendered within three days. Khwarazmian loyalists continued to defend the citadel for less than two weeks, before it was breache ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silk Road
The Silk Road () was a network of Eurasian trade routes active from the second century BCE until the mid-15th century. Spanning over 6,400 kilometers (4,000 miles), it played a central role in facilitating economic, cultural, political, and religious interactions between the Eastern world, East and Western world, West. The name "Silk Road", first coined in the late 19th century, has fallen into disuse among some modern historians in favor of Silk Routes, on the grounds that it more accurately describes the intricate web of land and sea routes connecting East Asia, East and Southeast Asia, the South Asia, Indian subcontinent, Central Asia, the Middle East, East Africa and Southern Europe, Europe. The Silk Road derives its name from the highly lucrative trade of silk, silk textiles that were Silk industry in China, produced almost exclusively in China. The network began with the Han dynasty, Han dynasty's expansion into Central Asia around 114 BCE, Protectorate of the Western Regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trade Route
A trade route is a logistical network identified as a series of pathways and stoppages used for the commercial transport of cargo. The term can also be used to refer to trade over bodies of water. Allowing goods to reach distant markets, a single trade route contains long-distance arteries, which may further be connected to smaller networks of commercial and noncommercial transportation routes. Among notable trade routes was the Amber Road, which served as a dependable network for long-distance trade. Maritime trade along the Spice Route became prominent during the Middle Ages, when nations resorted to military means for control of this influential route. During the Middle Ages, organizations such as the Hanseatic League, aimed at protecting interests of the merchants and trade became increasingly prominent. In modern times, commercial activity shifted from the major trade routes of the Old World to newer routes between modern nation-states. This activity was sometimes carried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthworks (military)
A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere'' ("to make"). From very early history to modern times, defensive walls have often been necessary for cities to survive in an ever-changing world of invasion and conquest. Some settlements in the Indus Valley civilization were the first small cities to be fortified. In ancient Greece, large stone walls had been built in Mycenaean Greece, such as the ancient site of Mycenae (famous for the huge stone blocks of its 'cyclopean' walls). A Greek '' phrourion'' was a fortified collection of buildings used as a military garrison, and is the equivalent of the Roman castellum or English fortress. These constructions mainly served the purpose of a watch tower, to guard certain roads, passes, and borders. Though smaller than a real fortress, they acted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedentism
In cultural anthropology, sedentism (sometimes called sedentariness; compare sedentarism) is the practice of living in one place for a long time. , the large majority of people belong to sedentary cultures. In Sociocultural evolution, evolutionary anthropology and archaeology, ''sedentism'' takes on a slightly different sub-meaning, often applying to the transition from nomadic society to a Lifestyle (sociology), lifestyle that involves remaining in one place permanently. Essentially, sedentism means living in groups permanently in one place. The invention of agriculture led to sedentism in many cases, but the earliest sedentary settlements were pre-agricultural. Initial requirements for permanent, non-agricultural settlements For small-scale nomadic societies it can be difficult to adopt a sedentary lifestyle in a landscape without on-site agricultural or livestock breeding resources, since sedentism often requires sufficient year-round, easily accessible local natural resourc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steppe
In physical geography, a steppe () is an ecoregion characterized by grassland plains without trees apart from those near rivers and lakes. Steppe biomes may include: * the montane grasslands and shrublands biome * the temperate grasslands, savannas and shrublands biome A steppe may be semi-arid or covered with grass or with shrubs or with both, depending on the season and latitude. The term " steppe climate" denotes the climate encountered in regions too dry to support a forest but not dry enough to be a desert. Steppe soils are typically of the chernozem type. Steppes are usually characterized by a semi-arid or continental climate. Extremes can be recorded in the summer of up to and in winter, . Besides this major seasonal difference, fluctuations between day and night are also very great. In both the highlands of Mongolia and northern Nevada, can be reached during the day with sub-freezing readings at night. Mid-latitude steppes feature hot summers and cold wint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nomad
A nomad is a member of a community without fixed habitation who regularly moves to and from the same areas. Such groups include hunter-gatherers, pastoral nomads (owning livestock), tinkers and trader nomads. In the twentieth century, the population of nomadic pastoral tribes slowly decreased, reaching an estimated 30–40 million nomads in the world . Nomadic hunting and gathering—following seasonally available wild plants and game—is by far the oldest human subsistence method. Pastoralists raise herds of domesticated livestock, driving or accompanying them in patterns that normally avoid depleting pastures beyond their ability to recover. Nomadism is also a lifestyle adapted to infertile regions such as steppe, tundra, or desert, ice and sand, where mobility is the most efficient strategy for exploiting scarce resources. For example, many groups living in the tundra are reindeer herders and are semi-nomadic, following forage for their animals. Sometimes also described as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 demilitarized zones, border zones and certain restrictive easement zones and green belts. Such zones may be comprised by a sovereign state, forming a buffer state. Buffer zones have various purposes, politically or otherwise. They can be set up for a multitude of reasons, such as to prevent violence, protect the environment, shield residential and commercial zones from industrial accidents or natural disasters, or even isolate prisons. Buffer zones often result in large uninhabited regions that are themselves noteworthy in many increasingly developed or crowded parts of the world. Conservation For use in nature conservation, a buffer zone is often created to enhance the protection of areas under management for their biodiversity importance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irrigation
Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow Crop, crops, Landscape plant, landscape plants, and Lawn, lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been developed by many cultures around the world. Irrigation helps to grow crops, maintain landscapes, and revegetation, revegetate disturbed soils in dry areas and during times of below-average rainfall. In addition to these uses, irrigation is also employed to protect crops from frost, suppress weed growth in grain fields, and prevent soil consolidation. It is also used to cool livestock, reduce dust, dispose of sewage, and support mining operations. Drainage, which involves the removal of surface and sub-surface water from a given location, is often studied in conjunction with irrigation. There are several methods of irrigation that differ in how water is supplied to plants. Surface irrigation, also known as gravity irri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arys (river)
The Arys ( kk, Арыс, ''Arys'') is a river of southern Kazakhstan and a right tributary of the Syr Darya. The river is long, covering a basin area of . The river begins in the ridge, and average water flow is . The highest runoff is in April during snow melt, the lowest is in August. The river is used for irrigation to grow rice in the lower reaches. The largest tributaries are the Mashat, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tributary
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of . The Madeira River is the largest tributary river by volume in the world with an average discharge of . A confluence, where two or more bodies of water meet, usually refers to the joining of tributaries. The opposite to a tributary is a distributary, a river or stream that branches off from and flows away from the main stream. PhysicalGeography.net, Michael Pidwirny & S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
