As the soldiers of the American divisions on OMAHA came ashore they faced German defenders of the 352nd, 716th and a regiment of the 709th Infantry Division, the latter under the tactical command of the 352nd. Without the bulk of their tanks artillery and lacking close air support the Americans struggled across the beaches and were cut down in large numbers before being pinned down behind the sea wall.
With the Americans pinned down on the beach unable to advance, the time tables for the reinforcing waves became snarled amid the German beach obstacles which had not been cleared.... This was in large part due to 40% casualties among the Combat Engineers and the loss of all but five bulldozers.
Naval officers were frustrated in their attempts to provide naval gunfire support by the lack of identifiable targets on the beaches. Yet German strongpoints were knocked out by either by superbly directed vigorous gunfire from destroyers steaming as close as 800 yards offshore, or by determined action from Rangers or infantry
Under their leadership small units from the 116th which had its linage back to the Stonewall Brigade as well as elements of the 16th and 18th Infantry Regiments began to move forward..... Surviving junior leaders began to lead survivors through the dunes and up the bluffs to attack German defenders of the roads leading up from the beach from the flank and rear. A mid-day break in the weather allowed some close tactical air support giving the troops badly needed support.
US 1st Infantry Division Troops at the Omaha sea wall
“German strongpoints were knocked out by either by superbly directed vigorous gunfire from destroyers steaming as close as 800 yards offshore”
That’s a largely forgotten part of the battle. Around 9:00 am destroyer captains off of Omaha beach realized that something was going very wrong with the landing. Their decision to bring their ships right up to the beach in order to pick off strongpoints may well have decided the battle:
Destroyers at Normandy: Naval Gunfire Support at Omaha Beach
http://www.history.navy.mil/library/online/destroyersatnormandy.htm