Mustered into service as a Private on July 29th, 1861
Private Andrews was wounded at the Battle of the Wilderness on May 5th, 1864. He was transferred to Company C of the 20th Indiana Infantry in the fall of 1864 and remained there until his discharge on July 12th, 1865.
Isaac never filed for a pension after the war. It is very possible he died soon after.
Unknown date of death or burial location.