fights battle of Stone's River, 155;
reluctant to advance, 156;
drives Bragg out of Tennessee, 156, 157;
refuses to move, 163;
finally advances to Chattanooga, 163, 164;
defeated at Chickamauga, 164;
unnerved after Chickamauga, 164;
cheered by Lincoln, 164;
besieged in Chattanooga, 165;
relieved by Grant, 165.