Communism in Eastern Europe refers to the political and economic ideology that gained significant traction in the region following World War II, leading to the establishment of one-party socialist states. Rooted in Marxist-Leninist principles, communism aimed to abolish private property and establish a classless society through state control of the economy. This ideology dramatically reshaped Eastern European countries, especially in the aftermath of Nazi Germany's defeat, as Soviet influence expanded and new governments were established.