During the Mine Run Campaign, Warren's corps was ordered to attack Lee's army, but he perceived that a trap had been laid and refused the order from army commander Maj. Gen. George G. Meade.
Under Mine Run kampagnen blev Warren's korps beordret til at angribe Lees hær, men han fornemmede, at der var blevet lagt en fælde og afviste ordren fra generalmajor George G. Meade.