Here was an opportunity for a skilful commander, but Burnside decided to make Fredericksburg a base, and to move thence upon Richmond.
On Nov. 15, he turned his back upon Lee and marched for Fredericksburg.
Meanwhile, he had made some important changes in his organization, by the formation of three grand divisions out of his six corps in order to lessen the routine duties of his office.
This organization was not kept up by Burnside's immediate successors, but under Grant in 1864 something equivalent was developed in separate armies and in large corps.
Besides the troops shown above, the right grand division comprised two brigades of cavalry and a battery, and each of the others, one brigade of cavalry and a battery.
There was also an artillery reserve of 12 batteries, an engineer brigade with the pontoon train, and an escort and a provost guard of infantry and cavalry.
On Dec. 10, the return of the army showed present for duty, as follows: —
Right Grand Di