The Illinois 9th Infantry Regiment was at the center of most all the activity in the west except for the siege of Vicksburg. After being engaged at Shiloh, they spent the next couple of years in central Tennessee, then "led the charge" on Sherman's invasion of Georgia. They participated in the March to the Sea and Carolina's Campaign, ending the war with the battle of Bentonville, in North Carolina. The regiment lost during service 5 Officers and 211 Enlisted men killed and mortally wounded and 1 Officer and 200 Enlisted men by disease. Total 417. Companies of the Illinois 9th Infantry Regiment Company A - Madison County Company B - St. Clair County Company C - St. Clair County Company D - St. Clair County and Randolph County Company E - Mercer County and St. Clair County Company F - St. Clair County Company G - Jackson County, Johnson County and Williamson County Company H - Montgomery Company I - Madison County Company K - Pulaski County