 Fortifications were completed before the beginning of 1796, in time to provide support to the Spanish when war broke out with the United States, and when hostilities began again between the Chickasaw and Creek Indians; the Treaty of San Lorenzo, between Spain and the young U.S., ended that part of the hostilities, and ceded Spanish territory "above the 31st parallel," including the Fort, to the U.S, "thus marking the end of the European colonial era in Alabama.