Answer:
They occur a day or two after an earthquake.
Explanation:
Representative Democracy is the answer you are looking for
That they want to expand building westward, like they did during the purchase. They also wanted to control as much land as they can to explore out west. The Louisana Purchase gave the American explorers new opportunites, doubling the size of the U.S. and from there, they continued to move out west. The Lousiana Purchase in general, partially started the Manifest Destiny. (pardon my grammar)
