Leonard O Lathrop enlisted with the 4th Illinois Cavalry as a private on September 13 1861 in Bristol, Illinois .

He then enlisted with Company "C", 4th Cavalry Regiment Illinois on September 26 1861.

Leonard received a disability discharge Company C, 4th Cavalry Regiment Illinois on April 30 1862; possibly wounded at the battle of Shiloh.

Leonard and his Wife Josie A, filed for a invalid pension in the State of Illinois on April 8 1868, his wife Josie A Lathrop filed in Illinois as a Widow on June 16 1897. Their Lawyer is listed as E.L.Harden