Millburn played a vital role during the Revolutionary War. With George Washington's military camped outside at Morristown and the British assaulting through the Hobart Gap, Millburn was brought into the Revolutionary War. Washington purportedly saw his soldiers on a vital point in the South Mountain Reservation, then known as Washington Rock. The Battle of Springfield in 1780 was the last push of the British into New Jersey and the first fight since Bunker Hill. A token of the war exists in the Parsil family graveyard on White Oak Ridge Road, where Nicholas Parsil was buried after being killed in a clash with the British.