Complex sentence: His brother-in-Law, General der Artillerie Curt Gallencamp (17 February 1890-April 1958), received the Knight's Cross of the Iron Cross on 19 November, 1941, while commanding the 78th Infantry Division on the Eastern Front.
Split into simpler sentences: His brother-in-Law, Artillery General ("General der Artillerie") Curt Gallencamp (17 February 1890 to April 1958), received the Knight's Cross of the Iron Cross on 19 November 1941. He received the Knight's Cross while commanding the 78th Infantry Division on the Eastern Front.