10 September 1921 – Birth of John W. Morris, American general

1939 – The submarine HMS Oxley is mistakenly sunk by the submarine HMS Triton near Norway and becomes the Royal Navy's first loss.

1939 – Death of Wilhelm Fritz von Roettig, German general

1939 – Canada declares war on Nazi Germany, joining the Allies – France, the United Kingdom, New Zealand and Australia.

1942 – The British Army carries out an amphibious landing on Madagascar to re-launch Allied offensive operations in the Madagascar Campaign.

1943 – German forces begin their occupation of Rome.