Very little has been written about the U-boat war in the Indian Ocean, where almost forty German submarines were assigned to operate from the Malaysian port of Georgetown alongside troops of the occupying Imperial Japanese forces. From that base they sailed across the vast Indian Ocean and into the Pacific. Success in this theatre of war could very possibly have swung the tide of battle in North Africa in favour of Rommel, and the joint operations with the Japanese allowed the Germans to penetrate the Pacific Ocean for the first time, attacking shipping off the Australian coast and hunting off New Zealand. Plans were even made to attack US supply lines. Hitler's Grey Wolves is the story of this forgotten campaign, bringing it vividly to life through Lawrence Paterson's incisive analysis, eyewitness testimony and an extensive collection of contemporary photographs.