1 févr. 1939 - AUGUST 23- Soviet Union signs Non-Aggression Pact with Germany
AUGUST 25 – Britain and Poland sign Mutual Assistance Treaty
SEPTEMBER 1- Nazis invades Poland
SEPTEMBER 3 – Britain, France / Austria / New Zealand declare war on Germany
SEPTEMBER 4 – British Royal Air Force attacks the German navy
SEPTEMBER 5 – United States proclaims neutrality
SEPTEMBER 10 – Canada declares war on Germany; Battle on Atlantic begins
SEPTEMBER 17 – Soviets invades Poland