In January and February 1865 McGlashan commanded the brigade in Simms 's absence , but returned to his regiment for the Appomattox Campaign . At the Battle of Sayler 's Creek on April 6 he became a Prisoner of War . Some days earlier President Jefferson Davis , priorly to fleeing from Richmond , had signed McGlashan 's promotion to brigadier general ; but it was not delivered or confirmed by Congress in time . This promotion makes him the last appointed general of the Confederacy . He was brought to the Old Capitol Prison in Washington , D.C. , where he was during President Lincoln 's assassination . Afterwards he was held in the prison camp on Johnson 's Island , Ohio until he was released on July 25 , 1865
assassination
Assassination of Abraham Lincoln
Peter A.S. McGlashan