The next move for the 4th Division was to begin movement down the three causeways through the flooded farmland behind the beach to link up with the 101st Airborne, who had dropped behind enemy lines before dawn. 2nd Battalion and several tanks headed down Causeway 1 towards Poupeville, which they discovered had already been captured by the 3/501st Parachute Infantry Regiment. A dozen German infantrymen, trapped between the two Allied forces, surrendered. Causeway 2, directly behind La Grande Dune, eventually became the main exit road off the beach. Securing this causeway required the capture of Ste. Marie du Mont, about inland. The Germans had blown a small bridge over a culvert, and movement was delayed while engineers made a repair and cleared two inoperable tanks from the road. Causeway 2 quickly became congested, so some units opted to walk through the flooded areas beside the road. Several hundred defenders were positioned in and around Ste. Marie du Mont, including 6th "Fallschirmjäger" Regiment of the 91st Infantry Division. Members of the 506th Parachute Infantry successfully attacked batteries at Holdy and Brécourt Manor and took Ste. Marie du Mont in house-to-house and street combat, clearing the way for 8th Infantry, 3rd Battalion to advance up Causeway 2 practically unopposed. 8th Infantry, 1st Battalion headed up Causeway 3 towards Audouville-la-Hubert, which had already been captured by the 502nd Parachute Infantry. As at Poupeville, enemy soldiers (in this case several dozen) were caught between the two converging forces and had to surrender.