This illustrated WWII reference guide presents detailed profiles of Nazi U-Boat commanders who were awarded the Knight's Cross.   The Knight's Cross--or Ritterkreuz--was one of the highest decorations given for acts of valor among the German armed forces during the Second World War. When a U-boat captain was awarded the decoration, it was source of pride for his entire crew. Sometimes it was even added to the boat's insignia. In all, there were 123 recipients. In The U-Boat Commanders, Jeremy Dixon provides a highly illustrated guide to all these men and their wartime service.   A detailed text accompanied by almost 200 archive photographs describes the military careers of each U-Boat Commander, including those who received the higher grades of the award. Full details are given of their tours of duty, the operations they took part in, how they won their award, how many ships they sank, and their subsequent careers.