▁of ▁Illinois ▁ ▁Massachusetts ▁Institute ▁of ▁Technology ▁ ▁Georgia ▁School ▁of ▁Technology ▁ ▁Ohio ▁State ▁University ▁Upon ▁successful ▁completion ▁of ▁pre fl ight ▁training , ▁flight ▁cad ets ▁were ▁sent ▁to ▁Camp ▁John ▁Dick ▁A viation ▁Con cent r ation ▁Center , ▁located ▁at ▁the ▁Texas ▁State ▁Fair ground s ▁in ▁Dallas . ▁There ▁the ▁cad ets ▁would ▁be ▁processed ▁and ▁placed ▁in ▁groups ▁for ▁their ▁primary ▁flight ▁training . ▁ ▁Primary ▁Training ▁Primary ▁and ▁advanced ▁training ▁became ▁a ▁major ▁issue ▁with ▁the ▁United ▁States ' ▁entry ▁into ▁World ▁War ▁I . ▁ ▁In ▁April ▁ 1 9 1 7 , ▁the ▁Army ▁had ▁fewer ▁than ▁ 1 0 0 ▁flying ▁officers ▁and ▁only ▁three ▁flying ▁fields — H az el h urst ▁Field , ▁Mine ola , ▁New ▁York ; ▁Camp ▁Kelly , ▁San ▁Antonio , ▁Texas , ▁ ▁and ▁Rock well ▁Field , ▁San ▁Diego , ▁California . ▁There ▁was ▁also ▁a ▁se ap lane ▁base , ▁Ch and ler ▁Field , ▁Ess ington , ▁Pennsylvania . ▁▁ ▁However , ▁Ch and ler ▁Field ▁was ▁closed ▁in ▁the ▁summer ▁of ▁ 1 9 1 7 ▁as ▁in ade qu ate , ▁and ▁its ▁personnel ▁and ▁equipment ▁transferred ▁to ▁the ▁new ▁Ger st ner ▁Field , ▁Louisiana . ▁ ▁Because ▁it ▁would ▁take ▁a ▁long ▁time ▁to ▁construct ▁ade qu ate ▁training ▁facilities ▁in ▁the ▁United ▁States , ▁Canada ▁provided ▁flying ▁bases ▁at ▁Des er onto ▁and ▁Camp ▁B orden ▁in ▁the ▁Toronto ▁area ▁during ▁the ▁summer ▁of ▁ 1 9 1