In the immediate aftermath of the War of 1812, Native peoples in the Upper Midwest (what was then called the Northwest) and in the Southeast (then the Southwest) suffered almost immediate consequences. The war all but destroyed the power of many of the Native people in the Midwest, as most had fought alongside the British. This paved the way for American expansion into the territories that became Indiana and Illinois, and later Wisconsin and Michigan. Something similar happened in the old Southwest, where the War of 1812 encompassed a civil war among the powerful Creek people. Their power was broken by this conflict, and they, and other native peoples in the region, including the Cherokee, Choctaw, Chickasaw, and Seminoles, were driven from their lands over the two decades that followed. The states of Alabama, Mississippi, and Louisiana were established on lands taken by force and by treaty from these Native peoples. So the War of 1812 opened the way for US expansion, which by the outbreak of the Civil War, resulted in the removal of almost every large group of Native Americans east of the Mississippi. So in a very real sense, US expansion pushed Native Americans off their lands.