If one single weapon in Germany's arsenal can be said to have come closest to winning the war for the Third Reich, it was without doubt the U-Boat. German U-Boat technology, training, tactics and combat successes far exceeded those of any of the other combatant nations, and even as the Third Reich was crumbling, technically advanced vessels such as the Type XXI, many years ahead of its time, were being put into volume production. Gordon Williamson provides a fascinating overview of the achievements of the U-Boat Waffe in both wars, together with a study of the uniforms and insignia worn by U-Boat crews.

Gordon Williamson is a retired civil servant who spent several years working for the Royal Military Police (TA). He has written over 60 military books, including a number of titles for Osprey: ELI 183 U-boat Tactics in World War II, MAA 434 World War II German Police Units etc. Amongst his primary interests are the German Navy in World War II, U-Boats, and the Military Police forces of the Allied and Axis armies. He lives near Edinburgh in Scotland.