Complex sentence: Executive Order 9279, dated December 5,1942, transferred the Selective Service System to the War Manpower Commission; but a year later it was made a separate agency directly responsible to the President.
Split into simpler sentences: Executive Order 9279, dated December 5,1942, transferred the Selective Service System to the War Manpower Commission. However, a year later it was made a separate agency directly responsible to the President.