What was the cause and effect of the us mexican war

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

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.

Which statement best describes why henry adams was beaten