Organized 5 Feb 1861 as part of the Louisiana State Army, the 1st Heavy Artillery transferred to Confederate service 13 Mar 1861, with 744 men. Regimental headquarters remained at the New Orleans Barracks while the various companies occupied the forts of the New Orleans defenses.
The Regiment marched out after the surrender of Vicksburg and went into a camp for paroled prisoners. After being exchanged, the Regiment went into service at Mobile, arriving in January of 1864.
The Regiment continued to garrison batteries in the Mobile area until 11 Apr 1865, when they were dismantled and the men evacuated as part of the evacuation of Mobile. When Lieutenant General Richard Taylor's Army surrendered on 8 May 1865, the 1st Heavy Artillery was camped at Cuba Station, Alabama; and the men receivd their paroles as part of Taylor's Army.
