Hitler's desperate need for iron ore was the main reason for his attack on Norway in April 1940. The battle for Narvik's ice-free harbor soon became a crucial objective for both Allied and Axis forces. Attack at Dawn covers the two key battles that fought on 10th and 13th of April. The first battle was initiated by the British Navy, who had orders to prevent a German landing. U-boats failed to spot the patrolling British destroyer flotilla and, early in the morning on April 10th, they sank two German destroyers and six merchant ships in the harbor. The Germans retreated but, unbeknown to the British, five more destroyers were anchored nearby. Battle continued on April 13th. In total, 10 destroyers sank—only U51 survived by escaping to sea. Attack at Dawn is an epic drama which involved naval and land forces. It is the first key investigation of the battle and forms part of an award-winning trilogy.