Battle of South Mountain

The regiment lost 32 killed, 95 wounded, and 3 missing. Lieutenant Colonel Rutherford B. Hayes was wounded.

Battle of Antietam

The 23rd Ohio was commanded at Antietam by Major James M. Comly as Colonel Scammon commanded the division as senior officer and Lieutenant Colonel Hayes had been wounded at South Mountain.

From the monument:

This Regiment with its Brigade crossed the Ford of Antietam Creek in the afternoon of Sept. 17, 1862, and held this position until the close of the battle. Its loss was 8 men killed, 1 officer and 58 men wounded, 2 men missing, total 69.

From the War Department marker for Ewing’s Brigade on the Antietam bayylefield:

On the evening of September 16th, Ewing’s Brigade formed line under cover of the ridge east of the Antietam, and southeast of the Burnside Bridge. On the morning of the 17th it followed the left bank of the Antietam to Snavely’s Ford where it crossed and moving up the right bank of the stream until nearly abreast the bridge, advanced in support of Rodman’s Division over the hills and ravines to this point where it met and temporarily checked the advance of A.P. Hill’s Division. Its left having been turned by the enemy, it fell back to the cover of the rolling ground east of this tablet.

From Major Comley’s Official Report on the 23rd Ohio at Antietam:

The Twenty-third fell in with the enemy about 9 o’clock a. m. yesterday near the summit of the mountain. We immediately formed and advanced to meet him. The order was given to charge, and the regiment advanced to the charge in as good order as possible, through the thick woods into a corn-field. The enemy was behind the stone fence at the crest of the hill, five regiments, with one piece of artillery.

As soon as our approach was discovered, a deadly fire was opened from the enemy’s whole line. Most of our loss occurred at this point. Colonel Hayes was wounded and carried off the field; also Captain Skiles, Company C; Lieutenant Naughton, Company F, slightly, and Lieutenant Hood, supposed mortally. I soon afterward received information that the enemy were flanking us on the left, and swung our line to face the new direction. About the same time you arrived with support, since which time the occurrences were under your own eye.

Third Battle of Winchester (Opequan)

The regiment lost 150 men

Fisher’s Hill

Battle of Cedar Creek