Five regiments from Indiana fought in the Battle of Antietam – one cavalry and four infantry. All are honored on a large state monument on the Hagerstown Pike and by individual monuments featuring a bronze tablet.

 State of Indiana monument at Antietam State of
Indiana
 Monument to the 3rd Indiana Cavalry Regiment at Antietam 3rd Indiana
Cavalry Regiment
 Monument to the 7th Indiana Infantry Regiment at Antietam 7th Indiana
Infantry Regiment 
 Monument to the 14th Indiana Infantry Regiment at Antietam 14th Indiana
Infantry Regiment  
 Monument to the 19th Indiana Infantry Regiment at Antietam 19th Indiana
Infantry Regiment  
 Monument to the 27th Indiana Infantry Regiment at Antietam 27th Indiana
Infantry Regiment  

Indiana sent over 125,000 men to the Union Army in the Civil War, but most fought in the Western Theater.