 As the war began , William Stacy served as major in Colonel Benjamin Woodbridge 's regiment of Minutemen , which was organized into Woodbridge 's ( 25th ) Regiment . During the Siege of Boston , Woodbridge 's regiment was based at Cambridge , Massachusetts , near Boston , and participated in the Battle of Bunker Hill , the first large @-@ scale battle of the war . An orderly book shows that on June 13 , 1775 , several days before the battle , Major Stacy was officer of the night guard , while Colonel William Prescott , who would be the primary leader of patriot forces during the battle , was officer of the day . Stacy was recommended for commission on June 16 , the day before the battle . On June 17 , 1775 , Woodbridge 's regiment of 300 soldiers arrived at Bunker Hill and took up positions immediately prior to the battle , and parts of the regiment engaged . A portion of Woodbridge 's regiment joined Colonel Prescott 's regiment at the redoubt and breastwork on the hill , and a company from Woodbridge 's regiment deployed on the right flank . 
