After acquiring Florida (in 1821), the U.S. Government decided that the only way to 'deal' with the Seminoles was to confine them on a Reservation, as they had been doing with the other Eastern Indians. Putting them on a Reservation would be the first step in implementing the 'Final Solution' which was to eventually forcefully remove them to the West or kill them if they resisted. This is how Indian Removal was implemented in America.
The first step was to enter into a treaty with the Seminoles that got them to agree to move into a Reservation. The Treaty that accomplished this first step was executed between the U.S. Government and the Seminoles of Florida on September 18, 1823. It was called the Treaty of Moultrie Creek in that the meeting took place on Moultrie Creek south of St. Augustine. The main provision of the Treaty was the establishment of a 4 million acre 'Reservation' into which the Seminoles were to relocate themselves from their scattered towns throughout North Florida. The Reservation boundary extended from what is now Ocala south to Lake Okeechobee and was approximately 20 miles from the coast.
The U.S. Government agreed to protect the Seminoles from trespassing Settlers, provide them with livestock (cattle and hogs), and construct a school and a blacksmith shop. An Indian Agent was to be provided to live among them, and represent their interests. The Seminoles in turn were to stay within the Reservation and help capture and return Blacks to Slavery. The Treaty was to last 20 years (1843). However, after 9 years, the Government annulled it and told them they had to leave Florida entirely.