During the advance Cole's battalion was subjected to continuous fire from artillery, machine guns and mortars. Cole's battalion, advancing slowly by crawling or crouching, took numerous casualties. The survivors huddled against the bank on the far side of the causeway. An obstacle known as a Belgian gate blocked nearly the entire roadway over the last bridge, allowing the passage of only one man at a time. Attempts to force this bottleneck were futile, and the battalion took up defensive positions for the night.