Germany invades Poland; occupies Bohemia and Moravia; renounces pact with England and concludes 10-year non-aggression pact with USSR.

Russo-Finnish War begins; Finns to lose one-tenth of territory in 1940 peace treaty.

World War II begins. (For detailed chronology, see World War II.)

In U.S., Roosevelt submits $1,319-million defense budget, proclaims U.S. neutrality, and declares limited emergency.

Einstein writes FDR about feasibility of atomic bomb. New York World's Fair opens.

DAR refuses to allow Marian Anderson to perform.

Gone with the Wind premieres.