- According to S253, "Dr. Vincent H. Gregg completed his education in select school at Beech Grove. In Civil War a major 1st Div. 23rd Army Corps. In 1869 he was appointed Internal Revenue Assessor" (191).
According to the Civil War Soldiers and Sailors System, Vincent H. Gregg was in the 124th Regiment of the Indiana Infantry. This unit was mostly involved in the western sphere of operations, especially in Tennessee and Georgia. The 124th was "Organized at Richmond, Terre Haute and Indianapolis, Ind., November, 1863, to March, 1864. Mustered in March 10, 1864. Left State for Louisville, Ky., March 19; thence moved to Nashville, Tenn. Attached to 1st Brigade, 1st Division, 23rd Army Corps, Army of the Ohio, to June, 1864. 4th Brigade, 3rd Division, 23rd Army Corps, to August, 1864. 2nd Brigade, 3rd Division, 23rd Army Corps, to December, 1864. 1st Brigade, 1st Division, 23rd Army Corps, Army of the Ohio, to February, 1865, and Dept. of North Carolina to August, 1865."
An image is available here: http://civilwarindiana.com/soldiers/reg124.html. He is on the Civil War page.