 The final chief signal officer during the war was Colonel Benjamin F. Fisher, former chief signal officer of the Army of the Potomac, who had been captured near Aldie, Virginia, in the Gettysburg Campaign and spent eight months in Libby Prison before escaping and returning to duty.The Signal Corps completed its wartime service and was dissolved in August 1865.During its lifetime, 146 officers were commissioned in the corps or were offered commissions.