Explanation:

1, a cold war is a state of conflict between nations that does not involve direct military action but is pursued primarily through economic and political actions, acts of ESPIONAGE or conflict through surrogates. the surrogates are typically States that are "SATELLITES" of the conflicting nations i..e.., nations allied to them or under their political influence. it might also mean giving military aid (such as weapons or economical aid,or perhaps even soldiers) to lesser Nations oppressed or in guerilla war with the opposing county of a cold war.

2, the tension and rivalry between the USA and the UUSR was described as the cold war (1945-1990).

there was never a real war between the two sides between 1945 and 1990 but they were often very close to war (hotspots). both sides got involved in other conflicts in the world to either stop the spread of communsim (USA) or help the spread (USSR)

3, Historians have identified several causes that led to the outbreak of the Cold War, including: tensions between the two nations at the end of World War II, the ideological conflict between both the United States and the Soviet Union, the emergence of nuclear weapons, and the fear of communism in the United States