出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/06/10 06:20 UTC 版)
The domino theory was a theory during the 1950s to 1980s, promoted at times by the government of the United States, that speculated that if one state in a region came under the influence of communism, then the surrounding countries would follow in a domino effect. The domino theory was used by successive United States administrations during the Cold War to clarify the need for American intervention around the world.