cruises of German submarine U-54 in 1916-1918. Great photo quality, comments in German. A 44 min. film from 1917 about a cruise of the German submarine U-35. A German propaganda film without dead or wounded; many details about submarine warfare in World War I. In 6 parts. Room 40: original documents, photos and maps about World War I German submarine warfare and British Room 40 Intelligence from The National Archives, Kew, Richmond, UK. German Type U 31 submarines U-boats commissioned in 1914 World War I submarines of Germany 1914 ships Ships built in Kiel