The Second World War is usually seen as a titanic land battle, decided by mass armies, most importantly those on the Eastern Front. Phillips O'Brien shows us the war in a completely different light. In this compelling new history of the Allied path to victory, he argues that in terms of production, technology and economic power, the war was far more a contest of air and sea supremacy. He shows how the Allies developed a predominance of air and sea power which put unbearable pressure on Germany and Japan's entire war-fighting machine from Europe and the Mediterranean to the Pacific. Air and sea power dramatically expanded the area of battle and allowed the Allies to destroy over half of the Axis's equipment before it had even reached the traditional 'battlefield'. Battles such as El Alamein, Stalingrad and Kursk did not win World War II; air and sea power did.