One effect of the increasing pan-Indian alliance was steady pressure from Harrison and the U.S. government to establish land-cession treaties, including a pivotal one made in 1809. Under the terms of the Treaty of Fort Wayne, the tribes in the Wabash River area ceded an estimated 2.5 to 3 million acres of land to the U.S. government. While warriors continued to congregate at Prophetstown, Tenskwatawa and Tecumseh, who adamantly wanted to retain their independence from the United States, denounced the treaty. They became openly hostile to those who had signed it, including other tribal leaders, and began discussions of a possible alliance with the British.