Gore graduated in 1776 , and promptly enlisted in the Continental artillery regiment of his brother @-@ in @-@ law Thomas Crafts , where he served as a clerk until 1778 . The Gore family was divided by the war : Gore 's father was a Loyalist who left Boston when the British Army evacuated the city in March 1776 . Gore was consequently called upon to support his mother and three sisters , who remained in Boston . In 1779 Gore successfully petitioned the state for the remaining family 's share of his father 's seized assets .