In the winter of 1943, an allied army of nearly 300,000 men invades Italy. Mussolini has surrendered, but Hitler and his feared paratroop regiments refuse to give up. At Monte Cassino, 60 miles south of Rome, the Allied forces under the command of General Harold Alexander come face to face with the fanatic defenders of Hitler's Third Reich. Will the 6th century monastery of Monte Cassino, now home to the Germans, become a casualty of war? Over the next 6 months more than a 100,000 allied troops will be killed and wounded. Aerial reconnaissance photographs taken at the time have now been layered over a 3-D contour map to create a CGI "model" of the battles.