In January 1917 the CSO advised the House Committee on Military Affairs that during 1917 the Aviation Section would increase in size to 13 aero squadrons: four land plane squadrons based in the United States, three seaplane squadrons to be based in U.S. possessions overseas, and six reserve squadrons for coast defense. By the time of the United States entry into World War I in April, three squadrons (1st and 3rd in the U.S., 2nd in the Philippines) were in service, two (6th for Hawaii and 7th for the Panama Canal Zone) were organizing, and two (4th and 5th, to be based in the continental U.S.) had yet to receive personnel. In March, for planning purposes, the Army Chief of Staff proposed new tables of organization and authorized a total of 20 squadrons, including an additional squadron in the U.S. and six additional for coast defense. However the plan was never implemented because of the war and only 131 of the required 440 officers had been assigned.