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How does the concept of competition relate to the arms race between the us and the soviet union during the cold war?

Why did un coalition troops battle iraqi forces in 1991? iraq had invaded saudi arabia, along with its other border nations.iraq had invaded kuwait, which was a major source of the world's oil.the united nations wanted to remove saddam hussein from power.the united nations wanted to prevent the trade of illegal drugs.

Ireally have to get this done today and i'd appreciate any i could get, !