Germany and Japan
I would say Germany. Although Japan was a big enemy.
Communism....
It was the Russians who wanted to start a war
The USSR
Soviet Union (Russia.)
cold war
they react so aggressively and almost lead to destructive war
It caused the vietnamese and the cold war. Because of nuclear power and the raise of Americas power
National Security; the enemy has ears.
Captain Eddie Rickenbacker
The Cold War involved the entire world; every country was an actual or potential enemy or friend of either the US or the USSR.