 The foothold gained on D @-@ Day at Omaha , itself two isolated pockets , was the most tenuous across all the D @-@ Day beaches . With the original objective yet to be achieved , the priority for the Allies was to link up all the Normandy beachheads . During the course of June 7 , while still under sporadic shellfire , the beach was prepared as a supply area . Surplus cargo ships were deliberately sunk to form an artificial breakwater and , while still less than planned , 1 @,@ 429 tons of stores were landed that day . 
