There were two levels of advanced schooling. The first was the Command and General Staff School at Fort Leavenworth, which concentrated on teaching officers both command and staff duties related to corps and divisions. Although viewed as competitive, nearly all officers eventually attended. A 1937 survey showed that 97 percent of the Army's colonels and 95 percent of its lieutenant colonels were graduates. There were two senior schools, the Army War College and the Army Industrial College. The Army War College taught the handling of higher formations. The Army Industrial College taught industrial mobilization.