Philip Barton Key, was an American Loyalist during the American Revolutionary War and later was a United States Circuit Judge and Chief United States Circuit Judge of the United States circuit court for the Fourth Circuit and a United States representative from Maryland.

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.