Pershing restated the responsibilities of the Air Service AEF with G.O. No. 81, May 29, 1918, in which he replaced Foulois as Chief of Air Service AEF with a West Point classmate and non-aviator, Major General Mason Patrick. Air Service staff planning had been inefficient, with considerable internal dissension as well as conflict between its members and those of Pershing's General Staff. Aircraft and unit totals lagged far behind those promised in 1917. Officers in the combat units balked at taking orders from Foulois' non-flying staff. Considerable house-cleaning of the existing staff resulted from Patrick's appointment, bringing in experienced staff officers to administrate, and tightening up lines of communication.