The U-101 was a Type VIIB U-boat of German Kriegsmarine during World War II. She was laid down on 31 March 1939 at Germaniawerft, Kiel, as &#x27;Werk 595&#x27;, launched on 13 January 1940 and commissioned under her first commander Kapitänleutnant Fritz Frauenheim on 23 September of that year. Frauenheim commanded her for her work-up with the 7th U-boat Flotilla between 11 March and 18 November 1940