Meanwhile, 22nd Infantry, 3rd Battalion and five tanks moved north along the beach, tasked with eliminating as many German strongpoints as possible. They discovered that tank fire could only destroy the concrete pillboxes via a direct hit on the embrasures, so they called for artillery fire from the naval vessels offshore. By evening they had combined with 12th Infantry, who had travelled directly across the flooded fields to a position far short of their target for the day, to form a defensive perimeter on the northern end of the beachhead. On the southern end of the beachhead, about 3,000 men of the 6th "Fallschirmjäger" Regiment moved into position near Saint-Côme-du-Mont, preventing the 501st Parachute Infantry from advancing any further on D-Day.