In the 19th century, America consolidated itself, spreading its territories through the Pacific Coast. Manifest Destiny had a major role to obtain support for expansionism. Manifest Destiny was an expression created by the writer John O'Sullivan in 1845 to incentive Texas's incorporation to the Union. Manifest Destiny turns into a moral ideology, presenting expansionism as a divine mission, which means that it was necessary to remove the Native American populations along the way. In the face of the expansion and the evident massacre, the Native Americans fought as they could.
