In the fall of 1937, the Army War College's course on the use of airpower reiterated the General Staff position and taught that airpower was of limited value when employed independently. Using attaché reports from both Spain and Ethiopia, and endorsed by a senior Air Corps instructor, Col. Byron Q. Jones, the course declared that the Flying Fortress concept had "died in Spain", and that airpower was useful mainly as "long range artillery." Air Corps officers in the G-3 Department of the General Staff pointed out that Jones' conclusions were inconsistent with the revised TR 440-15, but their views were dismissed by Deputy Chief of Staff Maj. Gen. Stanley Embick with the comment: "No doctrine is sacrosanct, and of all military doctrines, that of the Air Corps should be the last to be so regarded."