Was a period of constant tension between US and USSR that lasted from 1948 to 1991.
There were 2 sides
Western bloc: Led by US and made up of countries in western europe and they colonial empires. Most of this countries had democratic governments and capitalist economy. They belong to NATO, that was a military alliance. Its objective was to protect Western bloc from the communist Eastern bloc.
Eastern bloc: Led by USSR was composed by Soviet unions and communist states from Eastern Europe. The Eastern bloc spanded to invade Cuba, some Africa, North Korea, Vietnam...