Posegate settled at his in-laws' home in Ohio, after moving from Memphis, and enlisted in the 48th Ohio, Company A. He also helped recruit for the volunteer infantry. Among his written work is The Sunday Battle at Shiloh, a first hand eyewitness at the
Battle of Shiloh. Posegate fought in the Siege of Vicksburg, after which he resigned his post on June 25, 1863, claiming bad eyesight. His resignation letter in the National Archives is accompanied by a surgeon's certificate verifying the deterioration of Posegate's eyesight and his inability to fulfill his duties because of his vision. However, in September 1864, Posegate helped to organize the 175th Ohio and became a conditional second lieutenant in that outfit. == Political career ==