This book completes the story of one of the most formidable defensive lines in Europe in World War II, looking at the lesser known Mediterranean extension and describing how it was conceived of, built and used. After the alarming collapse of Italy in 1943, the Germans launched a crash building program and the 'Sudwall’ (South Wall) sprang up quickly along the French Mediterranean coast and the neighbouring Italian coast around Genoa. The new defenses were bolstered by existing French fortifications of key port towns such as Marseilles and Toulon many of them bristling with heavy artillery. Whilst describing the wall’s physical design features, this book also recounts the defenses’ role in the Allied invasion of Southern France; Operation Dragoon 'The Second D-Day’. As the Germans’ worst fears became a reality, the southern Atlantic Wall would face its ultimate test.