Poague commanded the battalion at Gettysburg, Bristoe Station, Mine Run, the Wilderness, Spotsylvania, North Anna, and Cold Harbor. Poague's greatest service to the Confederacy probably occurred at the Wilderness, where he was able to hold off Winfield S. Hancock's II Corps on the morning of the second day, firing over the heads of wounded Confederates, long enough for Lt. Gen.James Longstreet to arrive and "save the day". Lt. Gen. A.P. Hill turned to Poague, firing double charges, because things were so desperate that it could not be even delayed to allow wounded Confederates to get out of the way. Hill himself helped man Poague's guns.
After the War, Poague worked as a farmer, teacher, and lawyer. He represented Rockbridge County in the Virginia House of Delegates. He served Washington College, later Washington and Lee University as a Trustee from 1865 to 1885. He served as the treasurer of the Virginia Military Institute under superintendents Francis H. Smith and Battle of New Market hero Scott Shipp from 1884 until his death on September 8, 1914. He also served as Secretary of the Board of Visitors for VMI. He wrote a set of memoirs entitled Gunner With Stonewall. Poague's papers are collected at VMI. A home Poague built in 1885 is still structurally sound and remains in private use as a residence to this day, on Main Street in Lexington, Virginia. Poague is buried at Oak Grove Cemetery in Lexington.[1]