The State of Indiana monument at Antietam is on Hagerstown Pike just north of intersection with Cornfield Avenue. It was dedicated in 1910. see map
Four infantry and one cavalry regiments from Indiana fought at Antietam. Each has its own marker at the position where it was engaged as well as being honored on the state monument.
From the monument:
Indiana
7th Infantry
14th Infantry
19th Infantry
27th Infantry
3rd Cavalry
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