This 4th and last volume on the history of German submarines in Lorient will detail their last missions from September 1943 to Brazil, the Caribbean, the African coasts and especially the Indian Ocean, where they get their main results despite Some difficulties of understanding with their Japanese hosts ... You will know the relative efficiency of their latest technological innovations: radar detector, acoustic torpedoes against the escorts then schnorchel, as well as the sabotages always more important carried out by the French Resistance to interfere their repair capabilities. Three "special" missions carried out by the submarines of the 10th Flotilla will also be detailed: the installation of a weather station on the Labrador coast and the last projects of landing of agents on the American coasts ... You will also discover the arrival of the Japanese submarine I-29 and the waiting for I-52 for which crates of highly strategic equipment had been brought to Lorient. You will be able to follow the reaction of the submarines facing the D-Day followed by the evacuation of the base, then the role of Keroman during the siege of the Lorient Pocket. The fate of these refugee submarines in Norway will also be discussed. Finally you will discover the evolution of the submarine base retrieved by the Navy for fifty years, until its peaceful and tourist reconversion. This book, punctuated with testimonials, is illustrated by 500 exceptional photos of time very precisely captioned and presented chronologically, as well as by maps and plans. A notebook allows to discover vestiges, documents and memories relating to the presence of the U-Boote in Lorient. An essential book for all fans of the Battle of the Atlantic, submarines or the history of the port of Lorient.