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Domino theory
US theory (from the 1950s to the 1980s) stating that if one state came under the influence of communism, then the surrounding countries would follow
guerrilla warfare
war fought by small groups of irregular soldiers against larger regular forces
Vietnam War
a war fought between North and South Vietnam (1955–1975) that was part of the Cold War
hippie
person that belongs to a youth culture of the 1960s and 1970s