The Native American tribes were happy being left alone by the Americans. They happily signed treaties that let them keep their own land and way of life.
The Americans thought that the Native Americans were taking up to much space that could be used for their cotton fields and their brand new cotton gins. The Americans believed God sent them on this mission and they weren't going to back down.
President Jackson wanted to move the Native Americans. He ordered the Native Americans to be moved away from the land they wanted.
Trail of Tears
The Native Americans argued that this was unconstitutional. They were allowed their own land and the government was supposed to protect them.
No matter how much the Native Americans argued and fought, the American army still took them. They made them move across the Mississippi River, to never see or live in their homes again. The Americans took them and made them conquered subjects.
The worst of these was when the Cherokee were displaced. 2,500-6,000 Cherokee died along this path. Many people died from overexertion, but many more were also killed by the soldiers.