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Federal (USV)


Theodore Mason

(c. 1836 - 1862)

Home State: Pennsylvania

Branch of Service: Infantry

Unit: 90th Pennsylvania Infantry

Before Antietam

Age 26, he enlisted and mustered into service as Private, Company E, 90th Pennsylvania Infantry on 4 February 1862 in Philadelphia. He was probably appointed Color-Sergeant, date not known.

On the Campaign

He was killed in action at Antietam on 17 September 1862:

During the battle of Antietam, our corps was being vigorously attacked in a wooded and hilly part of the country, where our forces could not very well cope with an enemy accustomed to bush fighting. Nevertheless, in a hard and deadly struggle we were slowly but surely driving the enemy back, when Color-Sergeant Mason, who was in advance of our lines some four or five yards, cheering us on, was shot.

After the War

He was reinterred from his original burial on the battlefield to the National Cemetery in about 1867.

References & notes

Burial information from the Antietam Cemetery History.1 His service from the Card File,2 which says only that he was "not accounted for" at muster-out of the regiment. The quote above from Private William Paul, in Deeds of Valor.3 His gravesite is on Findagrave.


c. 1836


09/17/1862; Sharpsburg, MD; burial in Antietam National Cemetery, Sharpsburg, MD


1   Antietam National Cemetery, Board of Trustees, History of Antietam National Cemetery, Baltimore: John W. Woods, Steam Printer, 1869  [AotW citation 3850]

2   Commonwealth of Pennsylvania, Adjutant-General, Pennsylvania Civil War Veterans' Card File, 1861-1866, Published <2005, first accessed 01 July 2005, <>  [AotW citation 23408]

3   Beyer, Walter F., and Oscar F. Keydel, compilers, Deeds of Valor: How America's Heroes Won the Medal of Honor , Detroit: The Perrien-Keydel Company, 1901, pg. 90  [AotW citation 23409]