There was a time when the two major political superpowers on Earth were at war, but it was a strange kind of war. U.S.A. and the former U.S.S.R. used spies, subterfuge, blockades, political and military influence all over the world to gain power on a global scale. The so called "Cold War" era lasted decades and ended in 1989 with the fall of the Berlin wall. Games set in the cold war often include espionage and strategy elements.
Some of the most popular abandoned "cold war" games: