U-Boote deutsche .Graue Wölfe Deniz . Серые волки Дёница.

#Kriegsmarine U-Boot Single #submarines attacking convoys were eventually sunk, the losses of merchant ships were significantly reduced, and the German submarine war collapsed. #Karl Doenitz, who was a #submariner in world war I and became first commander of the 1st #u-boat flotilla and then commander of the #Kriegsmarine #u-boat forces, carefully studied the problems of German u-boats in the #WWI during the interwar years and developed his own tactics of #u-boat warfare, called the “#Wolfpack“ tactics.