William Augustus Bowles was an American-born military officer and adventurer. Born in Frederick County, Maryland, Bowles was commissioned into the Maryland Loyalists Battalion at the rank of ensign, seeing action during the American Revolutionary War, including the 1781 siege of Pensacola. He subsequently established an alliance with the Muscogee and founded the State of Muskogee. In 1803, Bowles was betrayed and handed over to the Spanish, who imprisoned him in Morro Castle, where he died two years later.

The Maryland Loyalists Battalion, also known as the First Battalion of Maryland Loyalists, was a Loyalist infantry unit which served on the side of the Kingdom of Great Britain during the American Revolutionary War. Raised in 1777 by Loyalist officer James Chalmers, the unit, consisting of one battalion, was organizationally part of the British Provincial Corps and saw action at the 1778 Battle of Monmouth and the 1781 Siege of Pensacola. It was disbanded in 1783 in the wake of the Patriot victory in the war.