The hopeless "Mud March" in a Virginia downpour ended Burnside's command of the force called this Army
3: Red River to Appomattox [PAR] That ended that; Grant informed Lee next day that he had no authority to accede 
..... wings of his army up to the Pee Dee River and called a halt at Cheraw, March 
35, .... his wily Georgia adversary, was back in command of the forces in his 
front.