Complex sentence: For defensive actions, SS- "Sturmmann" Gerardus Mooyman received the Knight's Cross of the Iron Cross; he was the first non-German to receive the Knight's Cross.
Split into simpler sentences: For defensive actions, SS- "Sturmmann" Gerardus Mooyman received the Knight's Cross of the Iron Cross. Mooyman was the first non-German to receive the Knight's Cross.