agreed to give up their Florida lands in exchange for lands west of the Mississippi River in Indian Territory. According to legend, Osceola stabbed the treaty with his knife, although there are no contemporary reports of this. Donald L. Fixico, an American Indian historian, says he made a research trip to the National Archives to see the original Treaty of Fort Gibson (also known as the Treaty of Payne's Landing), and that upon close inspection, he observed that it had "a small triangular hole shaped like the point of a knife blade". Five of the most important Seminole chiefs, including Micanopy of the Alachua Seminole, did not agree to removal. In retaliation, the US Indian agent, Wiley Thompson, declared that those chiefs were deposed from their positions. As US relations with the Seminole deteriorated, Thompson forbade the sale of guns and ammunition to them. Osceola, a young warrior rising to prominence, resented this ban. He felt it equated the Seminole with slaves, who were forbidden by law to carry arms. Thompson considered Osceola to be a friend and gave him a rifle. Osceola had a habit of barging into Thompson's office and shouting complaints at him. On one occasion Osceola quarreled with Thompson, who had the warrior locked up at Fort King for two nights until he agreed to be more respectful. In order to secure his release, Osceola agreed to sign the Treaty of Payne's Landing and to bring his followers into the fort. After his humiliating imprisonment, Osceola secretly prepared vengeance against Thompson. On December 28, 1835, Osceola, with the same rifle Thompson gave him, killed the Indian agent. Osceola and his followers shot six others outside Fort King, while another group of Seminole ambushed and killed a column of US Army, more than 100 troops, who were marching from Fort Brooke to Fort King. Americans called this event the Dade Massacre. These nearly simultaneous attacks catalyzed the Second Seminole War with the United States. Capture and death On October 21, 1837, Osceola and 81 of his followers were captured by General Joseph Hernández on the orders of General Thomas Jesup, under a white flag of truce, when they went for peace talks to Fort Peyton near St. Augustine. He was initially imprisoned at Fort Marion in St. Augustine, before being transferred to Fort Moultrie on Sullivans Island, outside Charleston, South Carolina. Osceola's capture by deceit caused a