Answer:
the withdrawal of eleven southern states from the Union in 1860, leading to the Civil War. When the southern states secede from the Union, they were breaking all ties to the United States and forming their own government.
Explanation:
Answer:
There were new technologies such as machine guns and submarines. Technologies that we only used by a few countries at the start. The development of tanks emerged during this period.
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)
