Prior to the
Normandy landings, the battery was subject to frequent
aerial bombardments but it was still operational on D-Day, 6 June 1944. At 5 a.m. on 6 June 1944, the commander of the Crisbecq battery was the first to sight the Allied invasion fleet through the battery rangefinder. He immediately reported his observation to the Kriegsmarine headquarters at Cherbourg, which triggered the German alarm throughout installations on the Atlantic coast. At 5:52 a.m. the order was given to open fire on the ships, which were then away. At 5:55 a.m., Crisbecq battery targeted and exchanged fire with the cruisers and and the battleship . At 6:30 a.m., the battery fired upon the US destroyer and sank her. At 8 a.m.,
Nevada hit the foremost casemated gun. The US battleships and , originally assigned to provide covering fire for the landing at
Omaha Beach, intervened to help silence the Crisbecq battery. At 9 a.m. the concentrated fire of the three battleships put the second casemate out of action, when a shell from
Nevada pierced the embrasure, killing the entire crew. The remaining gun behind casemate No. 24, withstood the naval bombardment, but was incapable of reaching targets out at sea; the gun initiated fire at 11 a.m., directed to the beach facing WN 5 Widerstandsnest 5 (Resistance Nest 5), . It caused heavy losses among the Americans and hindered the landing of material and reinforcements at
Utah Beach. The American 1st Battalion,
22nd Infantry Regiment,
4th Infantry Division started their advance towards Saint-Marcouf and the Crisbecq battery at 7 a.m. on 7 June. After the first assault they succeeded in entering Saint-Marcouf but were stopped in front of the battery by the 75mm flak guns that had been repaired and were put in firing positions against ground targets. A German counterattack on the flanks of the American forces, supported by the 105 mm K331 (f) guns from the
Azeville battery forced Captain Tom Shields to withdraw. Among the American dead was Preston Niland, one of the
Niland brothers. Concurrent to this ground fighting, the artillery duel between the Crisbecq battery and the Allied fleet continued. One of the Škoda 210 mm gun K39/41 had been put back into service during the previous night. The gun was damaged once more and remained silent for the rest of the day. The Americans brought several field artillery guns into position during the afternoon and immediately started firing at the battery. Subsequently, the battery was subjected to harassing fire every night. The American 1st Battalion started their second attack on the battery at 10 a.m. on 8 June and retook the village of Saint-Marcouf. At 1:30 p.m. after naval artillery had prepared the attack with a 20-minute bombardment and rolling artillery fire, the attack on the battery continued. The Americans succeeded in entering the battery perimeter. The Germans had fallen back in the shelters but the last 210 mm gun was destroyed. At 4 p.m., American forces started to blow up the shelters; seeing that his forces had been overwhelmed, Walter Ohmsen, commander of the Crisbecq battery, ordered the Azeville Battery to fire on his own position with its four 105 mm guns to force the attackers away. The effect was immediate and the Americans fell back in disarray. Ohmsen took advantage of the situation and counterattacked with the support of Leutnant Geissler's 6th company, and pushed the Americans back to Dodainville (roughly south-southeast of the battery). American casualties reached 15% of the forces they had committed to the attack and 98 soldiers were taken prisoner. By the morning of 11 June, the battery and its staff had run out of ammunition and medical equipment for the wounded and all the guns were out of service. In the afternoon, Walter Ohmsen received a phone call from Konteradmiral
Walter Hennecke, who instructed him to escape with the survivors. Leaving 21 wounded German soldiers and 126 American prisoners behind, Ohmsen and 78 men broke through the American encirclement and reached the German lines at
Aumeville, roughly away. ==See also==