During the evacuation, Cunningham was determined that the "Navy must not let the Army down." When army generals stated their fears that he would lose too many ships, Cunningham said that "It takes three years to build a ship, it takes three centuries to build a tradition." Despite advance warning through "Ultra" intercepts, the Battle of Crete resulted in a decisive defeat for the Allies. The invasion took a fearful toll of the German paratroops, who were dropped without their major weapons, which were delivered separately in containers. So heavy were the losses that General Kurt Student, who commanded the German invasion, would later say, referring to the German decision not to use parachutists in any future invasion attempts: