The Gap in Missionary Ridge at Rossville. Through this Georgia
mountain-pass runs the road to Ringgold. Rosecrans took advantage of it
when he turned Bragg's flank before the battle of Chickamauga; and on
November 25, 1863, Thomas ordered Hooker to advance from Lookout Mountain
to this point and strike the Confederates on their left flank, while in
their front he (Thomas) stood ready to attack. The movement was entirely
successful, and in a brilliant battle, begun by Hooker, Bragg's army was
swept from Missionary Ridge and pursued in retreat to Georgia.
[Illustration: THE SKIRMISH LINE