Henry Leonard Philipe, Baron d'Arendt was a Prussian officer who volunteered to serve in the Continental Army during the American Revolutionary War. He was made colonel of the German Battalion in March 1777 and remained its commander until the unit was disbanded at the beginning of 1781. He was placed in charge during the Siege of Fort Mifflin in October 1777 but did not distinguish himself, allowing Samuel Smith and Simeon Thayer to exercise actual command of the besieged fort. D'Arendt was the one who first suggested that George Washington appoint an Inspector General to his staff. This advice proved to be very useful to the American cause.