The main way in which <span>westward expansion in the US made jacksons election possible was that he was able to stand as the champion of the "common man" against the Native Populations, which he had forcibly removed in order to clear more area for white settlement. </span>
It is debated. He announced the Emancipation Proclamation on his own to weaken the Southern States, but later on needed approval for the passing of the 13th amendment
The Khmer Rouge took power in Cambodia immediately after the Vietnam War. I hope this helps :)
<span>It's the first one A.) "It allowed colonists to settle the Ohio River Valley after the French and Indian War." That should be the correct one. BTW, some people say that it's C. But I got that wrong. Don't do C.</span>