Dorchester County in the American Revolution

At this point I want to explain the importance of the letter from Marion to Horry. This letter lets us know that in fact the Southern American Army under Nathaniel Greene was camped in Dorchester County and skirmishing with the British on an almost daily occurrence as the American forces began to close the ring around Charles Town late in the war. So the  question becomes where were Marion, Greene, Lee, Washington, and the other American forces camped at during this time period and at other time periods in the war.

Thus begins the project, who, when, and where were American and British forces in Dorchester County during the American Revolution?