Mustered into service as a Private on July 29th, 1861
Private Adams became sick soon after arriving in Washington D.C. in the last summer of 1861. He was discharged in December of that year for disability.
On January 30th, 1863 he joined Company K of the 1st U.S. Artillery while in Washington D.C. He would serve there until his July 5th, 1864 when he was discharged because of term of service was over.
Isaac filed for a pension in June of 1880.
Unknown date of death or burial location.