(1836 - 1863)
Home State: New York
Command Billet: Commanding Regiment
Branch of Service: Infantry
Unit: 42nd New York Infantry
He had been in the 'wholesale commission' (brokerage) business in New York from about 1852, and had a seat on the Corn Exchange. He was "about five feet seven inches high, and of remarkably sinewy frame". He had been a member of the 7th New York Regiment for some years before the War, and served with them as a Private in 30-days service in April and May 1861, in Washington. He then joined the 40th New York ('Mozart') Regiment and was commissioned 2nd Lieutenant, Company K on 6 August 1861. He was promoted to 1st Lieutenant on 15 September, and made Adjutant of the Regiment in December. He transferred to Company A in April 1862.
He transferred to and was commissioned Major in the 42nd New York Infantry on 2 August 1862.
On the Campaign
He commanded the 42nd at Antietam as the senior officer present.
The rest of the War
He was promoted Colonel of the Regiment on 17 March 1863 and led them at Gettysburg. Colonel Mallon was acting in command of the Third Brigade, Webb's 2nd Division, 2nd Army Corps at Bristoe Station, where he was killed in action on 14 October 1863.
References & notes
09/12/1836; Brooklyn, NY
10/14/1863; Bristoe Station, Virginia