| | 1621 | City of Riga surrenders to Gustavus Adolphus. |
| | 1916 | First use of tanks (a whopping 15 machines) on the battlefield during the Battle of the Somme. |
| | 1942 | Japanese submarines sink U.S.S. Wasp and seven destroyers. |
| | 1944 | Americans capture island of Moluccas. |
| | 1944 | Americans invade Palau island, the costliest amphibious operation in American history. |