Complex sentence: Command of the Army Group was turned over to von Arnim in March, and on 13 May, remnants of the Afrika Korps surrendered, along with all other remaining Axis forces in North Africa.
Split into simpler sentences: Command of the Army Group was turned over to von Arnim in March. On 13 May, remnants of the Afrika Korps surrendered, along with all other remaining Axis forces in North Africa.