In just over four years, from July 7, 1940 to September 9, 1944, the port of Lorient saw 203 different U-Boote and two Japanese submarines. Up to 27 stopped at the same time at the end of March - beginning of April 1943. This port was undoubtedly the most important German submarine base of the Second World War. From Lorient, most U-Bootes went hunting in the Atlantic to the American coast, from Brazilian waters to the St. Lawrence River in Canada. Others found themselves stranded in the Mediterranean Sea while some crossed the Indian Ocean to reach the Far East. Several of them have carried out special missions to deposit secret agents in Ireland, on the coasts of Africa or the United States ... most were sunk in combat with all their crew, sometimes in the Bay of Biscay just after have left Lorient ... One of the last passed by this port, the U-853, will be sunk on May 6, 1945 just in front of New York, while the U-530 will only go once arrived in Argentina on 10 July 1945! This first volume, covering the period from June 1940 to June 1941, will help you discover the evacuation of the port by the French navy and its fight for honor. He will detail the installation of the German navy in Lorient and the first year of U-Boote presence in this port and the major stages of the Battle of the Atlantic in which they participated. The submarines that call at Lorient are presented in monthly tables according to their type, their fleet, their commander and their date of commissioning. You will know the life of the crews on the ground during the repairs of their building and the naval and air actions carried out by the British on the port of Lorient. This book is illustrated by 500 exceptional photos of time very precisely captioned and by 10 maps and plans. An essential book for all fans of the Battle of the Atlantic, submarines or the history of the port of Lorient.