From Allies to Rivals
During the Second World War, the USA, Britain and the USSR worked together to defeat Nazi Germany. However, this alliance was based more on necessity than friendship.
Once Germany was defeated in 1945, old disagreements quickly returned. The USA believed in capitalism and democracy, while the USSR believed in communism and dictatorship. Both superpowers feared the influence and intentions of the other.
These tensions gradually developed into the Cold War — a long period of hostility and rivalry between the USA and the USSR from around 1945 to 1991.
The Cold War was called “cold” because the two superpowers never fought each other directly in a full-scale war. Instead, they competed through propaganda, arms races, spies and conflicts in other countries.