Johnson's impeachment trial was held after he violated the: command of the army act, kansas-nebraska act, tenure of office act, missouri compromise?

Was the first african american to be appointed to the u.s. supreme court.

How did margaret thatcher de-escalate 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.