During the Civil War, Henry Oldham Robertson served in Company I of the 5th Texas Regiment (Hood’s Brigade) in the Confederate Army. After being wounded at the Battle of Gettysburg, Robertson was kept as a prisoner of war at the Hammond General Hospital in Point Lookout, Maryland. In April 1864, he was transferred to Chimborazo Hospital in Richmond, Virginia, before being released several months later.
From the guide to the Robertson, Henry Oldham, Papers 65-034., 1863-1864, and undated, (Dolph Briscoe Center for American History, The University of Texas at Austin)