Allied Forces 43,000 casualties The land of central Italyhelped the defence. At the end of 1943, following the Allied invasion of Italy, Allied forces were stuck at the Gustav Line. He planned to land two divisions at Anzio and capture Rome. To the west, Allied Major General John Lucas by now commanded 70,000 men, 237 tanks, 508 heavy guns, and 27,000 tons of supplies at Anzio, Italy, but … The Anzio and Nettuno beaches are on marshland. Operation Shingle was planned by Winston Churchillin December 1943. General Eberhard von Mackensen assumed overall control of forces in the Anzio, Italy area. Part of the Italian Theater of World War II (1939-1945), the campaign was the result of the Allies' inability to penetrate the Gustav Line following their landings at Salerno. Allied Forces Initially: 36,000 soldiers and 2,300 vehicles Breakout: 150,000 soldiers and 1,500 guns German Forces Initially: 20,000 German soldiers + five Italian battalions (4,600 soldiers) Breakout: 135,000 German soldiers + two Italian battalions. Anzio Order of Battle. The Battle of Anzio commenced on January 22, 1944 and concluded with the fall of Rome on June 5. However, the 5th Army did not have enough troops or a way to transport them. Whe… Battle of Anzio Casualties. Thid was defensive line across Italy. General Harold Alexanderhad thought of a plan using five divisions. 27 Jan 1944. Battle of Anzio, (22 January–5 June 1944), World War II event on the coast of Italy, south of Rome. British Prime Minister Winston Churchill sought to restart the Allied advance and proposed landing troops behind the … Intended as a daring outflanking move that would open up the way to the capture of Rome, the Anzio landings degenerated into World War II deadlock: the Allies unable to drive forward from their bridgehead and the Germans without the means to push the invaders back into the sea. 25 Jan 1944.