Gouverneur K. Warren
In October 1863, Lee attempted to flank the Union army near Warrenton, Virginia. Gregg's division delayed Lee until the II Corps under Maj. Gen. Gouverneur K. Warren arrived to block the movement. Gregg caused an incident when, after this engagement, he did not get adequate mention in Maj. Gen. George G. Meade's after action report and demanded a court of inquiry to correct the record.