The Battle of Machias (August 13–14, 1777) was an amphibious assault on the Massachusetts town of Machias (in present-day eastern Maine) by British forces during the American Revolutionary War. Local militia aided by Indian allies successfully prevented British troops from landing. The raid, led by Commodore Sir George Collier was executed in an attempt to head off a planned second assault on Fort Cumberland, which had been besieged in November 1776. The British forces landed below Machias, seized a ship, and raided a storehouse.