The Penobscot Expedition was a 44-ship American naval armada during the Revolutionary War assembled by the Provincial Congress of the Province of Massachusetts Bay. The flotilla of 19 warships and 25 support vessels sailed from Boston on July 19, 1779 for the upper Penobscot Bay in the District of Maine carrying an expeditionary force of more than 1,000 American colonial marines (not to be confused with the Continental Marines) and militiamen. Also included was a 100-man artillery detachment under the command of Lt. Colonel Paul Revere.