The Battle of Crooked Billet was a battle in the Philadelphia campaign of the American Revolutionary War fought on May 1, 1778 near the Crooked Billet Tavern (present-day Hatboro, Pennsylvania). In the skirmish action, British forces under the command of Major John Graves Simcoe launched a surprise attack against Brigadier General John Lacey and three regiments of Pennsylvania militia, who were literally caught sleeping. The British inflicted significant damage, and Lacey and his forces were forced to retreat into neighboring Bucks County.