Bays denied Manila harbor to the invading Japanese until Corregidor fell to amphibious assault on 6 May 1942, nearly a month after the fall of Bataan. Beyond tying up besieging Japanese forces (who suffered severe supply shortages due to the inability to use Manila as a port), the forts allowed interception of radio traffic later decisive at Midway. The Japanese defended the island of Betio in the Tarawa atoll with numerous 203 mm (8-inch) coastal guns. In 1943, these were knocked out early in the battle with a combined USN naval and aerial bombardment. Atlantic Wall Nazi Germany fortified its conquered territories with the Atlantic Wall. Organization Todt built a string of reinforced concrete pillboxes and bunkers along the beaches, or sometimes slightly inland, to house machine guns, antitank guns, and artillery ranging in size up to the large 40.6 cm naval guns. The intent was to destroy Allied landing craft before they could unload. During the Normandy Landings in 1944, shore bombardment was given a high importance, using ships from battleships to destroyers and landing craft. For example, the Canadians at Juno beach had fire support many times greater than they had had for the Dieppe Raid in 1942. The old battleships HMS Ramillies and Warspite with the monitor HMS Roberts were used to suppress shore batteries east of the Orne; cruisers targeted shore batteries at Ver-sur-Mer and Moulineaux; while eleven destroyers provided local fire support. The (equally old) battleship Texas was used to suppress the battery at Pointe du Hoc, but the guns there had been moved to an inland position, unbeknownst to the Allies. In addition, there were modified landing craft: eight "Landing Craft Gun", each with two 4.7-inch guns; four "Landing Craft Support" with automatic cannon; eight Landing Craft Tank (Rocket), each with a single salvo of 1,100 5-inch rockets; eight Landing Craft Assault (Hedgerow), each with twenty-four bombs intended to detonate beach mines prematurely. Twenty-four Landing Craft Tank carried Priest self-propelled 105mm howitzers which also fired while they were on the run-in to the beach. Similar arrangements existed at other beaches. On June 25, 1944 the American battleship Texas engaged German shore batteries on the Cotentin Peninsula around Cherbourg. Battery Hamburg straddled the ship with a salvo of 240mm shells, eventually hitting Texas twice; one shell damaging the conning tower and navigation bridge, with the other penetrating below decks but failing to explode. Return fire