Jacob Groh enlisted as a Corporal, in Company F, on September 13, 1861, at age 18 years, for a period
of 3 years.  Discharged October 20, 1864, expiration of term. 1890 address Amelia, Ohio; 1911 address
at RR2, Amelia, Ohio. [Source: The Invincibles, The Story of the Fourth Ohio Veteran Volunteer Cavalry 1861-1865 by Nancy Pape-Findley, Blood Road Publishing, Michigan, 2002, page 328]

A descendant of Jacob Groh's states: "He transferred to the 13th OVC, Company M on March 14, 1865
and mustered out at Amelia Court House, VA on July 4, 1865 by order of the War Department."

The 13th OVC was organized May 6, 1864, under Colonel Stephen R. Clark, it immediately joined the Army of the Potomac, acting as Infantry in the battles at White House Landing, Charles City, and in the protracted sieges and assaults at Petersburg. On the 30th of July the Regiment lost, in an assault upon the enemy, over one hundred and sixty men. It participated in engagements at Weldon Railroad, Ream's Station and other points with gallantry. In December, 1864, it was equipped with horses and Cavalry arms and took part in the grand operations that culminated in the capture of Lee's army. It made many brilliant charges and captured many prisoners. This Regiment lost in the service over three hundred men in killed and wounded. It captured over two thousand of the enemy, and participated in fourteen hard fought battles. It was mustered out August 10, 1865. [Source: http://www.ohiocivilwar.com/cwc13.html]