 By the early 18th century the Tocobaga had been virtually annihilated, having fallen victim to European diseases from which they had no immunity, as well as European conflicts.Later Spanish explorers named the area "Punta Piñal" (Spanish for "Point of Pines" or "Piney Point").After trading hands between the British and the Spanish, Spain finally ceded Florida to the United States in 1821, and in 1823 the U.S. Army established Fort Brooke (later Tampa).