John Sweeny was born in 1836.
John was married to Emily, probably sometime before the war broke out.
He was 25 years and old and possibly living in Muskegon County when he enlisted in Company H on May 6, 1861. (Company H, formerly the “Muskegon Rangers,” was made up largely of men from the vicinity of Muskegon and Newaygo counties.) He was shot on May 31, 1862, at Fair Oaks, Virginia, admitted to Judiciary Square hospital in Washington, DC on June 4, where he died from his wounds on June 7, 1862, and was buried on June 8 in the Military Asylum cemetery (Soldier's Home National cemetery), section C no. 2529.
In 1866 Emily applied for and received a pension (no. 90975).