On May 10, 1775, Ethan Allen and Benedict Arnold lead a successful attack on Fort Ticonderoga in upstate New York, while the Second Continental Congress assembles in Philadelphia, Pennsylvania.
The Congress faced the task of conducting a war already in progress. Fighting had begun with the Battle of Lexington and Concord on April 19, and Congress needed to create an official army out of the untrained assemblage of militia laying siege on Boston.
The transformation of these rebels into the Continental Army was assisted by the victory of the Vermont and Massachusetts militia under the joint command of Ethan Allen and Benedict Arnold at the British garrison at Ticonderoga on Lake Champlain. Their major achievement was to confiscate enough British cannon to make the Patriot militias into an army capable of an artillery barrage.