within the Indiana Territory for 3,000 Native Americans. An estimated 14 different tribal groups comprised the confederation at Prophetstown, but the majority of its inhabitants came from Shawnee, Delaware, and Potawatomi tribes. The growing community also caused settlers in the area to fear that Tecumseh was forming an army of warriors to destroy their settlements. There were also some Tutelo as well. 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. War with the United States Although historians have disagreed over whether Tecumseh or Tenskwatawa was the primary leader of the pan-Indian community that grew up around Prophetstown, Tenskwatawa remained its spiritual leader; however, his preaching grew more militant and increasingly political from 1808 to 1811. Some of Prophetstown's inhabitants became nervous about the rising tension between settlers and natives and left the village, but Tecumseh and Tenskwatawa continued to recruit young warriors to join their movement. By 1811, white settlers in the region, Harrison, and the Indiana territorial government had become concerned about the large number of Indians gathering at Prophetstown. After ongoing negotiations between Harrison and Tecumseh proved unproductive in 1811, Harrison decided to strike first and began to assemble his military forces. In the fall of 1811, when Tecumseh journeyed south to meet with representatives of other tribes in hopes of building a larger alliance, Tenskwatawa was left in command at Prophetstown. Before Tecumseh's departure, the two brothers discussed possible responses to U.S. military action and agreed that Tenskwatawa would try to avoid any confrontation during Tecumseh's absence. However, Tenskwatawa reconsidered the decision after Tecumseh's departure and prepared their warriors to fight the settlers if they approached Prophetstown. In the meantime, Harrison and his men began their march north from Vincennes toward Prophetstown and constructed a new fort (Fort Harrison) on Indian treaty land at the site of present-day Terre Haute,