 The American retreat from Fort Ticonderoga began late on July 5 after British cannons were seen on top of high ground , Mount <unk> ( <unk> <unk> Mountain and Sugar <unk> Hill ) that commanded the fort . The bulk of General Arthur St. Clair 's army retreated through Hubbardton to Castleton , while the rear guard , commanded by Seth Warner , stopped at Hubbardton to rest and pick up stragglers . 
