Tecumseh was outraged by the Treaty of Fort Wayne, believing that American Indian land was owned in common by all tribes, an idea advocated in previous years by the Shawnee leader Blue Jacket and the Mohawk leader Joseph Brant. In response, Tecumseh began to expand on the teachings of his brother, known as Tenskwatawa, a spiritual leader known as The Prophet, who called for the tribes to return to their ancestral ways. He began to associate these teachings with the idea of a pan-tribal alliance. Tecumseh traveled widely, urging warriors to abandon accommodationist chiefs and to join the resistance at Prophetstown.