July 23rd, 1939 (SUNDAY)
GERMANY: The German Grand Prix is held at the Nürburgring. Rudolf Caracciola wins driving a Mercedes.
In an attempt to "secure the Reich from Christian influence" Nazis demonstrate against Bishop Sproll of Rottenburg.
U.S.S.R.: Soviet submarine SC-216 laid down.
INDIA: Mahatma Ghandi writes to Adolf Hitler asking him to pull back from war.