Operations

The Anzio invasion began at 0200 on 22 January 1944 and achieved, General Lucas recalled, one of the most complete surprises in history. The Germans had already sent their regional reserves south to counter the Allied attacks on the Garigliano on 18 January, leaving one nine-mile stretch of beach at Anzio defended by a single company. The first Allied waves landed unopposed and moved rapidly inland. On the southern flank of the beachhead the 3d Division quickly seized its initial objectives, brushing aside a few dazed patrols, while unopposed British units achieved equal success in the center and north. Simultaneously, Rangers occupied Anzio, and the 509th Parachute Infantry Battalion seized Nettuno. All VI Corps objectives were taken by noon as the Allied air forces completed 1,200 sorties against targets in and around the beachhead. On the beach itself, the U.S. 36th Engineer Combat Regiment bulldozed exits, laid corduroy roads, cleared mines, and readied the port of Anzio to receive its first landing ship, tank (LST), an amphibious assault and supply ship, by the afternoon of D-day. By midnight over 36,000 men and 3,200 vehicles, 90 percent of the invasion force, were ashore with casualties of 13 killed, 97 wounded, and 44 missing. During D-day Allied troops captured 227 German defenders.

Allied units continued to push inland over the next few days to a depth of seven miles against scattered but increasing German resistance. In the center of the beachhead, on 24 January, the British 1st Division began to move up the Anzio-Albano Road toward Campoleone and, with help from the 179th Infantry Regiment of the 45th Infantry Division, captured the town of Aprilia, known as 'the Factory' because of its cluster of brick buildings, on 25 January. Within three days the continuing Anglo-American drive pushed the Germans a further 1.5 miles north of the Factory, created a huge bulge in enemy lines, but failed to break out of the beachhead. Probes by the 3d Division toward Cisterna and by the 504th Parachute Infantry Regiment toward Littoria on 24-25 January made some progress but were also halted short of their goals by stubborn resistance. Renewed attacks on the next day brought the Americans within three miles of Cisterna and two miles beyond the west branch of the Mussolini Canal. But the 3d Division commander, Maj. Gen. Lucian K. Truscott, Jr., on orders of the corps commander, called a halt to the offensive, a pause that later lengthened into a general consolidation and reorganization of beachhead forces between 26 and 29 January.

Meanwhile, the Allied troop and materiel buildup had proceeded at a breakneck pace. Despite continuous German artillery and air harassment, a constant fact of life throughout the campaign, the Allies off-loaded twenty-one cargo ships and landed 6,350 tons of materiel on 29 January alone, and on 1 February the port of Anzio went into full operation. Improving air defenses downed ninety-seven attacking Luftwaffe aircraft prior to 1 February, but the Germans did succeed in sinking one destroyer and a hospital ship, as well as destroying significant stocks of supplies piled on the crowded beaches. Mindful of the need for reinforcements, Lucas ordered ashore the rest of the 45th Infantry Division and remaining portions of the 1st Armored Division allotted to the Anzio operation, raising the total number of Allied soldiers in the beachhead to 61,332.