At the beginning of the American Civil War , he assisted with the fortification of Washington , D.C.
After graduating from the United States Military Academy at West Point in 1855 , Comstock served with the Army Corps of Engineers .
At the beginning of the American Civil War , Comstock assisted with the fortification of Washington , D.C.
After graduating from the United States Military Academy at West Point in 1855 , Comstock served with the Army Corps of Engineers .