After working for many years at the University of Chicago, Arthur Holly Compton returned to St. Louis in 1946 to serve as Washington University's ninth chancellor. Compton reestablished the Washington University football team, making the declaration that athletics were to be henceforth played on a "strictly amateur" basis with no athletic scholarships. Under Compton’s leadership, enrollment at the University grew dramatically, fueled primarily by World War II veterans' use of their GI Bill benefits.
In what year did World War II start? (If the question is unanswerable, say "unanswerable")
unanswerable