The invasion of Czechoslovakia, where their government eased censorship and planned for a new constitution, also resulted in the USSR sending in troops and killing thousands of people
Tension between the superpower nations caused the United States and the Soviet Union to start arming themselves, each making more powerful weapons than the other
The United States and the Soviet Union never formally fought each other, but fought through surrogates/representative states (Proxy Wars) in East Asia, the Middle East, Africa, and Latin America