Sphere Of Influence

In the field of international relations, a sphere of influence (SOI) is a spatial region or concept division over which a state or organization has a level of cultural, economic, military or political exclusivity.

While there may be a formal alliance or other treaty obligations between the influenced and influencer, such formal arrangements are not necessary and the influence can often be more of an example of soft power. Similarly, a formal alliance does not necessarily mean that one country lies within another's sphere of influence. High levels of exclusivity have historically been associated with higher levels of conflict.

In more extreme cases, a country within the "sphere of influence" of another may become a subsidiary of that state and serve in effect as a satellite state or ''de facto'' colony. This was the case with the Soviet Union and its Eastern Bloc after World War II. The system of spheres of influence by which powerful nations intervene in the affairs of others continues to the present. It is often analyzed in terms of superpowers, great powers, and/or middle powers.

Sometimes portions of a single country can fall into two distinct spheres of influence. In the 19th century, the buffer states of Iran and Thailand, lying between the empires of Britain, France and Russia, were divided between the spheres of influence of those three international powers. Likewise, after World War II, Germany was divided into four occupation zones, three of which later consolidated into West Germany and the remaining one became East Germany, the former a member of NATO and the latter a member of the Warsaw Pact.

The term is also used to describe non-political situations, e.g., a shopping mall is said to have a 'sphere of influence' that designates the geographical area where it dominates the retail trade.

Historical remnants

Many powerful states in past centuries had subordinate tributary states, whose native dynasty acknowledged the suzerainty of the great power.
Many areas of the world are joined by a cultural influence inherited from a previous sphere of influence, even if they are no longer under political control. Examples include Anglosphere, Arab World, Persosphere, Eurosphere, Francophonie, Françafrique, Germanosphere, Indosphere, Hispanidad, Latin Europe/Latin America, Lusophonie, Turkosphere, Sinosphere, Slavisphere, Malay world, Post-Soviet States and many others.

Early United States (1820s)

Alexander Hamilton, first U.S. Secretary of the Treasury, aimed for the United States to establish a sphere of influence in North America. Hamilton, writing in the Federalist Papers, harboured ambitions for the US to rise to world power status and gain the strength to expel European powers from the Americas, taking on the mantle of regional dominance among American nations, although most of the New World were European colonies during that period.

This doctrine, dubbed the 'Monroe Doctrine', was formalized under President James Monroe, who asserted that the New World was to be established as a Sphere of influence, removed from European encroachment. As the U.S. emerged as a world power, few nations dared to trespass on this sphere. (A notable exception occurred with the Soviet Union and the Cuban Missile Crisis.)

As of 2018, Secretary of State Rex Tillerson continued to refer to the Monroe Doctrine to tout the United States as the region's preferred trade partner over other nations such as China.

New Imperialism era (late 1800s–early 1900s)

For Siam (Thailand), Britain and France signed an agreement in 1904 whereby the British recognised a French sphere of influence to the east of the River Menam's ( Chao Phraya River) basin; in turn, the French recognised British influence over the territory to the west of the Menam basin and west of the Gulf of Thailand. Both parties disclaimed any idea of annexing Siamese territory.

In the Anglo-Russian Convention of 1907, Britain and Russia divided Persia (Iran) into spheres of influence, with the Russians gaining recognition for influence over most of northern Iran, and Britain establishing a zone in the Southeast.

China

In China, during the mid 19th and 20th centuries (known in China as the " century of humiliation"), Britain, France, Germany, Russia, and Japan held special powers over large swaths of Chinese territory based on securing "nonalienation commitments" for their "spheres of interest"; only the United States was unable to participate due to their involvement in the Spanish–American War. These spheres of influence were acquired by forcing the Qing government to sign "unequal treaties" and long-term leases.

In early 1895, the French laid claim to a sphere in Southwest China. By December 1897, German Kaiser Wilhelm II declared his intent to seize territory in China, precipitating the scramble to demarcate zones of influence in China. The Germans acquired, in Shandong province, exclusive control over developmental loans, mining, and railway ownership, while Russia gained a sphere over all territory north of the Great Wall, in addition to the previous tax exemption for trade in Mongolia and Xinjiang, economic powers similar to Germany's over Fengtian, Jilin, and Heilongjiang provinces. France gained a sphere over Yunnan, as well as most of Guangxi and Guangdong provinces; Japan over Fujian province; and the British over the whole Yangtze River valley (defined as all provinces adjoining the Yangtze river as well as Henan and Zhejiang provinces), parts of Guangdong and Guangxi provinces, and part of Tibet. Only Italy's request for Zhejiang province was declined by the Chinese government. These do not include the lease and concession territories where the foreign powers had full authority.

The Russian government militarily occupied their zone, imposed their law and schools, seized mining and logging privileges, settled their citizens, and even established their municipal administration on several cities, the latter without Chinese consent.

The powers (and the United States) might have their own courts, post offices, commercial institutions, railroads, and gunboats in what was on paper Chinese territory. However, the foreign powers and their control in some cases could have been exaggerated; the local government persistently restricted further encroachment. The system ended after the Second World War.

On September 6, 1899, U.S. Secretary of State John Hay sent notes to the major powers (France, Germany, Britain, Italy, Japan, and Russia), asking them to declare formally that they would uphold Chinese territorial and administrative integrity and would not interfere with the free use of the treaty ports within their spheres of influence in China, as the United States felt threatened by other powers' much larger spheres of influence in China and worried that it might lose access to the Chinese market should the country be officially partitioned. Although treaties made after 1900 refer to this " Open Door Policy", competition among the various powers for special concessions within China for railroad rights, mining rights, loans, foreign trade ports,