With the path to Hungnam blocked at Funchilin Pass, eight C-119 Flying Boxcars flown by the US 314th Troop Carrier Wing were used to drop portable bridge sections by parachute. The bridge, consisting of eight separate long, sections, was dropped one section at a time, using a parachute on each section. Four of these sections, together with additional wooden extensions were successfully reassembled into a replacement bridge by Marine Corps combat engineers and the US Army 58th Engineer Treadway Bridge Company on 9 December, enabling UN forces to proceed. Outmaneuvered, the PVA 58th and 60th Divisions still tried to slow the UN advance with ambushes and raids, but after weeks of non-stop fighting, the two Chinese divisions combined had only 200 soldiers left. The last UN forces left Funchilin Pass by 11 December.