British and Canadian troops come under intense fire from determined Germans ready to fight to the death on Hill 112 - an area of raised ground holding up the advance towards the Falaise region of Normandy. Meanwhile, the American Mechanised Army, under the leadership of General Patten, is racing towards Paris. Young boys quickly became men in the face of the horrors of battle, encountering the enemy at close hand for the first time. Nineteen-year-old Frank Rosier remembers when he killed a man: 'I sat on the ground and cried and was sick. I killed a human being - some mother's son. You know that's horrible.'