Imperialism is when one nation has more power over another. The nation that has more power is able to dominate, and control the other nation. During the time of Imperialism Americans believed that they were better than the natives so they decided to tell the natives hat they should believe and how to act. Imperialism was a very bad thing for the native nations, but a good thing for the Americans who gained control of more land.
This is a map of countries turned into colonies by technology advanced countries. Click on the different pinpoints to see what happened there.
This is a Crash course video made by Crash course. Not by us. This video explains almost everything about Imperialism.