United States and Russia.
The people that were involved in the cold war was the Soviet Union, Communist world, and the non-communist world (The US and the USSR)
The Cold War was most nations on Earth either on the American side or the Soviet side.
Some nations would join or were already part of the non aligned countries.
It was between the US and the USSR, the US ended up winning the "war"
The Cold War
The cold war was a period of time when the world operated under an aura of fear and was basically the USSR against the western world, such as the US and the UK. All of the nations involved felt that we were constantly poised on the brink of nuclear war, and people lived in fear that the world would be wiped out at the push of a button.
World War I, World War II, and the Cold War
The United States aligned themselves with the United Nations. It also became over involved with the Cold War. The US fought in Korea and the Viet Nam war in response to the Cold War. There were other small skirmishes until the Gulf War and Gulf War 2.
The cold war.
Angola was not involved in the Cold War
There was no one "world leader", but the two main competing nations were the United States and the Soviet Union.