Thomas Edison invented the electric light bulb
Harriet Tubman lead the slaves to freedom
Thomas Jefferson wrote the Declaration of Independence.
Ben Franklin assisted in the draft for the Declaration of independence but he is known for being the US ambassador for the revolutionary war
Franklin D Roosevelt was elected president four times
Hope this helps :)
It was important because it made you learn about how things change in History.
He disliked their decision, and refused to accept it.
The White Americans found out that the land that the Indians were living on had valuable materials on it and so they had the Indians removed disregarding the treaty and Americans moved in for the materials.