East Florida was originally a part of…
June 1779 CE
East Florida was originally a part of Spanish Florida.
Under the terms of the Treaty of Paris (1763), which ended the Seven Years' War, Spain ceded all of its territory east and southeast of the Mississippi River to the Kingdom of Great Britain.
The British divided the territory into two parts, East Florida, with its capital at St. Augustine, and West Florida, with its capital at Pensacola.
The British had moved the northern boundary of West Florida in 1767 to a line extending from the mouth of the Yazoo River east to the Chattahoochee River (32° 28′north latitude), consisting of approximately the lower third of the present states of Mississippi and Alabama.
Muskogee people (Creek people), have migrated into Florida since this time and formed the Seminole tribe.
By the beginning of summer 1779, American Revolutionary War, the Spanish, allied with the French (who are actively at war with Britain), recover control of East Florida and most of West Florida, including Pensacola.