After two weeks of negotiating, the Potawatomi leaders convinced the Miami to accept the treaty as reciprocity to the Potawatomi who had earlier accepted treaties less advantageous to them at the request of the Miami. Finally, the Treaty of Fort Wayne was signed on September 30, 1809, selling the United States over 3,000,000 acres (about 12,000 km2), chiefly along the Wabash River north of Vincennes. During the winter, Harrison was able to obtain the acceptance of the Wea by offering them a large subsidy. The Kickapoo were closely allied with the Shawnee at Prophetstown and Harrison feared they would be difficult to sway. He offered the Wea an increased subsidy if the Kickapoo would also accept the treaty, causing the Wea to pressure the Kickapoo leaders to accept. By the spring of 1810, Harrison had completed negotiations and the treaty was finalized.