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Federal (USV)


Frederick S. Allen

(c. 1841 - 1862)

Home State: Massachusetts

Branch of Service: Infantry

Unit: 20th Massachusetts Infantry

Before Antietam

A 20 year old clerk in New Bedford, MA, he mustered as Private, Company G, 20th Massachusetts Infantry on 18 July 1861. He was promoted to Corporal, date not given. He was captured in action at Ball's Bluff, VA on 21 October 1861 and held in a prison in Richmond, VA. He was exchanged to return to duty in February 1862. He was wounded and captured again, at Malvern Hill, VA on 1 July 1862, and exchanged in August.

On the Campaign

He was mortally wounded in the right arm, with fracture, by gunshot in action at Antietam on 17 September 1862.

The rest of the War

He was treated at the 2nd Corps field hospital on the Susan Hoffman Farm at Sharpsburg and his arm was amputated at the middle third. He was transferred to a US Army hospital in Frederick, MD on 29 September and was sent on to the US Army General Hospital in Chester, PA on the 30th. His arm deteriorated and was re-amputated at the shoulder on 12 October 1862 but he died of pyaemia (blood poisoning) from his wound at Chester on 25 October.

References & notes

Wound and hospital information from Nelson,1 the Patient List,2 and the MSHWR.3 Service from Soldiers, Sailors, and Marines.4 Further service details from W.H. Jeffrey's Richmond Prisons 1861-1862 (1867) and his memorial stone. His gravesite is on Findagrave.


c. 1841


10/25/1862; Chester, PA; burial in Linden Grove Cemetery, Westport, MA


1   Nelson, John H., As Grain Falls Before the Reaper: The Federal Hospital Sites and Identified Federal Casualties at Antietam, Hagerstown: John H. Nelson, 2004, pg. 113  [AotW citation 16110]

2   National Museum of Civil War Medicine, and Terry Reimer, Frederick Patient List, Published 2018, first accessed 17 September 2018, <>, Source page: patient #645  [AotW citation 20703]

3   Barnes, Joseph K., and US Army, Office of the Surgeon General, The Medical and Surgical History of the War of the Rebellion, 6 books, Washington DC: US Government Printing Office, 1870, Volume 2, Part 2, pg. 642  [AotW citation 20705]

4   Commonwealth of Massachusetts, Adjutant General, Massachusetts Soldiers, Sailors, and Marines in the Civil War, 8 Vols, Norwood (MA): Norwood Press, 1931-35, Vol. 2, pg. 549  [AotW citation 20704]