After World War II, tensions emerged between Western allies and the Soviet Union, known as the Cold War. At conferences during the war, the "Big 3" powers of the US, Britain, and Soviet Union discussed plans for postwar Europe. However, disagreements soon arose over whether Eastern European nations should be allowed free elections or become pro-Soviet. The Soviets established communist governments in these nations against the allies' wishes, dividing Europe into capitalist and communist spheres of influence. Massive economic mobilization during the war had widespread impacts on civilian life globally.