Complex sentence: Jost Metzler (26 February 1909--29 September 1975) was a "Korvettenkapitän" with the "Kriegsmarine" during World War II, commander of the U-boats and, and recipient of the Knight's Cross of the Iron Cross.
Split into simpler sentences: Jost Metzler (26 February 1909--29 September 1975) was a "Korvettenkapitän" with the "Kriegsmarine" during World War II and commander of and. He is also a recipient of the Knight's Cross of the Iron Cross.