Through Native American eyes, American history looks very different in the years 1800-1812 than it does from the eyes of United States citizens. Native Americans felt that they were being treated poorly and disrespectfully.
From the Native American perspective, they viewed the American expansion as a form of thievery. Native Americans were forced to sign treaties that were not in their best interests. In some cases, Native Americans were not being told the truth about what the treaties were going to do. In other cases, they were forced to give up their land against their will.
Things got so bad that Tecumseh tried to organize many Native American tribes into a confederation with him as the leader. This confederation would unite the Native Americans in battles against the expansion of the Americans. Unfortunately for Tecumseh, this confederation never formed because the United States attacked the Native Americans at the Battle of Tippecanoe under the leadership of William Henry Harrison while Tecumseh was away trying to organize this confederation.
The Native Americans viewed westward expansion through a very different lens than American citizens did.