The defeat of Imperial Japan & Nazi Germany may have ended the shooting wars, but it was not the end of Our Commitment, and it wasn't the end of dangers. Whole German and Japanese cities had been destroyed by allied bombs, but while we rebuilt our future allies, the Communists oppressed our future enemies.
The prognosis was bleak as the red flag of communism spread rapidly across Europe and Asia. The Cold War which began on the heels of WWII, would last until 1990. It would include the seige of Berlin, the hot wars of Korea, Viet Nam, Afghanistan, Grenada, Colombia, Nicarauga, El Salvador, and spawn the Islamist terrorists we fight now in the War On Terror. The Communist Cold War "hero" Che Gueverra would slaughter thousands of Bolivian peasants, after executing Cubans en masse.
But this video shows the first few years of the Communist rise to power.