The 14th New York Volunteer Infantry saw the bulk of its action during the Seven Days Battles. The regiment was engaged at Beaver Dam Creek, Gaines' Mill June 25, 1862, and was involved in the defense of the Union left flank at the Battle of Malvern Hill June 30, 1862 under Brigadier General Charles Griffin. In these engagements, and particularly in the Battle of Gaines's Mill the regiment suffered 225 dead and wounded, which comprise 83% of the total of 270 casualties suffered during the 14th's civil war service.