The survivors of Brigadier Generals James H. Lane's and Edward L. Thomas's brigades withdrew northeast to the old Dimmock Line defenses between the VI Corps breakthrough and Petersburg. Brigadier General Lane and Major General Wilcox stationed the men in Fort Gregg and Fort Whitworth, which were built along with the Boydton Plank Road Line in Fall 1864. The forts were northwest of the Boydton Plank Road, about in front of the Dimmock Line. Fort Whitworth (also known at various times as Fort Baldwin, Fort Anderson, and Fort Alexander) was to the north of Fort Gregg. Although Fort Whitworth was larger, it was deteriorated in part due to the removal of wood for firewood by some of the same Confederate troops now sent to defend it who were camped nearby during the winter. The two forts were connected only by an uncompleted trench at the rear.