During the American Revolutionary War, the regiment was involved in the defeat of George Washington in the Battle of Long Island in August 1776 and saw combat at the Battle of Harlem Heights in September 1776, the Battle of Fort Washington in November 1776 and the Battle of Piscataway in February 1777. It also fought at the Battle of Brandywine (light infantry and grenadier companies only) in September 1777, the Battle of Germantown (Light Company only) in October 1777 and the Battle of Monmouth in June 1778 as well as the Siege of Charleston in spring 1780. In September 1778 a detachment from the regiment raided Fairhaven, Massachusetts, inflicting severe damage on the town's shipping industry.