 In 1862, the 88th officially joined the Army of the Potomac and fought in the Seven Days Battles, Antietam, and Fredericksburg.The 88th fought at the battles of Gaines Mill, Glendale, Savage's Station, and Malvern Hill during the Seven Days Battles in Virginia.At the Battle of Antietam, the Irish Brigade was one of the many brigades to charge the famous "Bloody Lane," a road that was sunken down into the ground over years of use, now held by two Confederate brigades.