What was the cold war?
a war fought in antarctica
an attempt by the soviet union to invade the u. s. through canada
a period of difficult relations between the u. s. and the soviet union
the nickname for the battle fought during world war ii

In very general terms, the Cold War was "a period of difficult relations between the U.S. and the Soviet Union," since although there were a number of "proxy wars" during this time, the US and the USSR never engaged directly in conflict. 

The question of what caused the full effects of the radical stage, also called the second french revolution by some historians, which shook the political and social reforms in france have caught the attention of many scholars, particularly because of principles implemented during this stage which is contradictory to the fundamental principle of the french revolution itself, by using dictatorship to create equality.