When his diplomatic efforts failed to achieve the desired outcome, Tecumseh adopted a more militant stance. He began organizing armed resistance against the white settlers, leading attacks and raids on white communities and settlements that were encroaching on Native American lands. These actions brought him into direct conflict with the United States government, which eventually led to the outbreak of the War of 1812.
Throughout this period, Tecumseh played a significant role in resisting white expansionism and in defending Native American sovereignty. His leadership, diplomatic efforts, and military actions made him a prominent figure in the history of Native American resistance and the broader struggle for Native American rights.