Big Three
the main Allied leaders during WWII—Franklin D. Roosevelt (US), Winston Churchill (UK), and Joseph Stalin (USSR)—who shaped postwar decisions and the emerging Cold War order
Tehran Conference
1943 meeting of the Big Three to coordinate WWII strategy and discuss postwar plans, laying groundwork for postwar tensions
Yalta Conference
1945 meeting where the Big Three negotiated postwar Europe, division of Germany, and plans for Eastern Europe—setting up Cold War rivalries
Potsdam Conference
1945 meeting (Truman replaced Roosevelt) where Allied leaders finalized postwar arrangements, further heightening tensions between the US and USSR
Harry Truman
US president after FDR, took a tough stance against the USSR and launched key Cold War policies like the Truman Doctrine
Cold War
period of ideological, political, and economic rivalry (without direct war) between the US and USSR, shaping global relations after WWII
Dwight Eisenhower
US president (1953–1961), led during the Cold War, built up the US nuclear arsenal, warned of the “military-industrial complex
Self-Determination
the principle that nations have the right to choose their own government; supported decolonization but also led to Cold War proxy conflicts
Hydrogen Bomb
a powerful nuclear weapon developed and tested by both the US and USSR, escalating the nuclear arms race during the Cold War
Military-Industrial Complex
the alliance between a nation’s military and defense industries; Eisenhower warned it could gain too much influence during the Cold War