Analysis of information sources in references of the Wikipedia article "Flying Division, Air Training Command" in English language version.
by May 1943 there were fifty-six contract primary schools in operation. At each school, the AAF maintained a small military contingent whose services were gradually expanded, but the military element in the activity of these schools was subordinated to the task of learning to fly.
In August 1943 the AAF Central Bombardier Instructor School was transferred from Carlsbad, New Mexico, to Midland ... the "West Texas Bombardier Triangle" of bases at Big Spring (1942), San Angelo (1942), and Childress (1943), and were instrumental in developing photographic and sonic methods of scoring bomb hits and analyzing bombing proficiency
by May 1943 there were fifty-six contract primary schools in operation. At each school, the AAF maintained a small military contingent whose services were gradually expanded, but the military element in the activity of these schools was subordinated to the task of learning to fly.