By day four, the battered division was too weak to make any attempt to reach the bridge. Of the nine infantry battalions, only the 1st Battalion, Border Regiment, still existed as a unit; the others were just remnants and battalions in name only. The division, unable to do anything for the 2nd Battalion at the bridge, dug in, forming a defensive perimeter around Oosterbeek with its base on the river. The remnants of the 10th and 156th battalions at Wolfheze began to fall back, but several elements were surrounded and captured. Some 150 men of 156th Battalion were pinned down just west of the Oosterbeek. These men broke out in the late afternoon, with 90 of them making it into the perimeter. At the bridge, Lieutenant Colonel Frost finally made radio contact with the division and was told that reinforcement was doubtful. Shortly afterwards, Frost was injured by a mortar bomb, and command passed to Major Frederick Gough. Gough arranged a two-hour truce to evacuate his wounded (including Frost), who were taken into captivity. That night, some units managed to hold out for a while and several tried to break out towards Oosterbeek, but by 05:00 on day five, all resistance at the bridge had ceased.