1781 1782 1783 The Battle of Fort Charlotte, also known as the siege of Fort Charlotte, was a two-week siege conducted by Spanish general Bernardo de Gálvez against the British fortifications guarding the port of Mobile, (which was then in the British province of West Florida, and now in Alabama) during the Anglo-Spanish War of 1779-1783.When Spain entered the American Revolutionary War in 1779, Bernardo de Gálvez, the energetic governor of Louisiana, immediately began offensive operations.Following these successes, he began planning operations against Mobile and Pensacola, the remaining British presence in the province of West Florida.The garrison's regulars were primarily from the 60th regiment, and were augmented by Loyalists from Maryland and Pennsylvania, as well as local volunteers, in total about 300 men.On March 1, Gálvez sent Lt. Col. Francisco Bouligny to deliver a letter to Durnford offering to accept his surrender, which was politely rejected.[4] Gálvez did not immediately move against Pensacola after his victory at Fort Charlotte, although he wanted to take advantage of the British disorganization caused by the attempt to support Mobile.However, since he knew that Pensacola was strongly defended, and armed with powerful cannons, he again requested large-scale naval support from Havana.