Mobile, Alabama, was occupied by Canby's army on 12 April 1865. The 33rd Illinois marched to the Alabama state capital at Montgomery on 13–25 April. Entering the statehouse, the soldiers of the 33rd Illinois held a mock legislative session in which they voted for Jefferson Davis to be hanged for treason, army rations to be changed to roast beef and turkey with cranberries, and their army pay to be increased to $100 per month. The regiment marched to Selma on 10 May and rode the railroad to Meridian, Mississippi, on 17 May. While at Meridian in July, the unit was filled up with soldiers transferred from the 72nd Illinois, 117th Illinois, 122nd Illinois, and 124th Illinois. Later, the regiment moved to Vicksburg where the soldiers were mustered out of service on 24 November. They traveled to Camp Butler where the enlisted men were discharged on 6 December and the officers discharged on 7 December 1865. A total of 1,924 men were carried on the muster rolls during the war. The 33rd Illinois Infantry Regiment suffered the loss of 2 officers and 56 enlisted men who were killed in action or who died of their wounds; and 1 officer and 250 enlisted men who died of disease, giving a total of 309 war fatalities.