Spheres of influence

The Monroe Doctrine is a United States foreign policy position that opposes any foreign interference in the Western Hemisphere. Originally concerning European colonialism, it holds that any intervention in the political affairs of the Americas by foreign powers is a potentially hostile act against the United States. The doctrine was central to American grand strategy in the 20th century.

treaty dividing territory between Portugal and Spain

area where a state has a level of political, military, economic or cultural influence

thumb|Chinese dragons, legendary creatures in Sinosphere mythology and culture thumb|A map of the families of List of writing systems|writing systems in East Asia, Southeast Asia, and South Asia. Red: [[Chinese characters; Green: Brahmi script; Blue: Aramaic (Mongolian script, Manchu alphabet, Old Uyghur alphabet, and Arabic script).]] thumb|Map of the Sinosphere nations (Japan, Korea, China and Vietnam) in the 11th century The Sinosphere, also known as the Chinese cultural sphere, East Asian cultural sphere, or the Sinic world, encompasses multiple countries in East Asia and Southeast Asia th

countries allied with the United States and NATO during the Cold War

Eurasianism ( ) is a socio-political movement in Russia that emerged in the early 20th century under the Russian Empire, which states that Russia does not belong in the "European" or "Asian" categories but instead to the geopolitical concept of Eurasia and the "Russian world", forming an ostensibly standalone Russian civilization. The ideology is geopolitical, similar to Atlanticism and Gulfism.

propaganda term for the sphere of influence of the Japanese empire, purporting to provide pan-Asian autonomy free from European colonialism

crescent-shaped region of the Middle East with higher Shia population; passes through Lebanon, Iraq, Iran, and Bahrain

Microsoft business strategy in acquiring software platforms

' (), meaning Middle Europe', is one of the German terms for Central Europe. The term has acquired diverse cultural, political and historical connotations.

The Eurosphere or the European Empire is a concept centered around the European Union's sphere of influence, a term associated with the public intellectual Mark Leonard, Oxford University academic Jan Zielonka, the European Union Director-General for Politico-Military Affairs Robert Cooper and the former European Commission President José Manuel Barroso.

Byzantine sphere of influence

thumb|The region of the former Yugoslavia with EU member states (Slovenia 2004, Croatia 2013) in dark green and non-EU states in light green.

United States presidential doctrine