Complex sentence: Ellis did not receive the promotion, but was awarded the Navy Distinguished Service Medal, Navy Cross, which he received on November 11,1920, while France awarded him the Croix de guerre and Légion d'honneur (Grade of Chevalier).
Split into simpler sentences: Ellis did not receive the promotion, but was awarded the Navy Distinguished Service Medal and Navy Cross, which he received on November 11,1920. In addition, France awarded him the Croix de guerre and Légion d'honneur (Grade of Chevalier).