The monument to the 15th Massachusetts Volunteer Infantry Regiment at Antietam is on the east side of State Route 65, north of the Visitor Center. (39.478459° N, 77.751516° W;see map)

The monument features a dying lion, its right paw raised in definance. It was designed by sculptor A.O. Connor and dedicated on September 17, 1900.

Monument map: Philadelphia Brigade Park

From the front of the monument:

15th REG. MASS. VOLS.

Here, Sept. 17th, 1862, the Fifteenth Reg. Mass.
Volunteers, with the First Company Andrew Sharpshooters
attached, 606 men of all ranks, commanded by
Lieut. Col. John W. Kimball, Gorman's Brigade
Sedgwick's Division, Second Army Corps
met and engaged troops of the Brigades of
Semmes, Early and Barksdale.
Within twenty minutes 330 had fallen, 75 killed
and 255 wounded, 43 dying of wounds.

From the bronze tablet on the rear of the monument:

Killed

Co. B

Capt. Clark S. Simonds Private John Campbell " " Daniel Carpenter

Co. C

Capt. Richard Derby Private Zadoc Batterson " " Hiram A. Chambers " " John Frazer " " Charles E. Holbrook " " John P. Larkin Co. I " " George W.B. Sawyer

Co. D

Private Leander J. Owens " William S. Sholes " Charles H. Styles " George H. Thompson

Co. E Sergt. Amos H. Shumway Private John H. Curran " James H. Davis " Alexander Thompson " Conrad M. Tower " Charles H. Wheelock

Co. F

Sergt. Elisha F. Johnson Corp'l William L. Blood " Joseph G. Fretts " John W. Heath Private Henry R. Bliss " Shepard Brown " Benjamin Davis " John H. Hillman " Alfred L. Russell " James E. Sargent " Justus G. Wellington

Co. G

Private Arthur J. Andrews " Asa T. Bryant " Harrison J. Clisbee " Edward S. Johnson " Michael Dugan " Orin L. Davis " Benjamin R. Elliott " Charles J. Merriam

Co. H

Sergt. James B. Fletcher

Corpl. Henry A. Collar Private Andrew Addision " Henry W. Ainsworth " O. W. Batchelder " Patrick Finnegan " Isaac E. Marshall " George N. Smith " Christopher Young

Co. I

1st Lieut. Frank S. Corbin

Co. D

Private Henry L. Amidon " Lucis H. Briggs " George Butler " William S. Chapman " Charles G. Foster " Abram Sargent " George R. Stone " Mose Wood

Co. K

1st Sergt. Thomas Fernald Private Adam N. Baker " E.R. Buffum ' Thomas Kelley " James Shay " Joseph T. Smith " John L. Starrett

Andrew Sharpshooters, 1st Co.

Captain John Saunders Lieut. William Berry Sergt. John Q. Adams " George Whittemore Corpl. Richard A. Van Mall Private Edwin T. Hills " Joseph S. Ingalls " Marcus M. Parmenter " Warren Snow " Martin V. Strong

Thomas C Fernald