Events
On This Day - August 4
| 1903 | RN College, Osborn | HM King Edward VII opened the RN College, Osborne: 'a cross between a workhouse and stable' |
| 1914 | Britain declares war | Germany declares war on Belgium. Britain declares war on Germany. Canada, as a self-governing Dominion, is thus committed to the conflict that "will be over by Christmas" |
| 1940 | Sealion (N 72) | HMS Sealion torpedoes and sinks the Norwegian merchant Toran off Homborsund, Norway. Having sunk the leading ship in a convoy she was lucky to escape when the second ship passed right over her breaking her periscopes. |
| 1943 | O 23 (Dutch) | O23 carries out Special Operation Gustavus III. A rendezvous, south of the Sembilan Islands, was made with the same junk as on 25 June 1943 to transfer personnel. |
| 1943 | Unseen (P 51) | HMS Unseen attacked the Italian light cruiser Luigi Cadorna, but without scoring a hit. |
| 1944 | Universal (P 57) | HMS Universal torpedoes and sinks the German auxilary minesweeper Petrel of the coast southern France. |
| 1944 | Vox (P 73) | HMS Vox torpedoes and sinks a German guardboat and the German sailing vessels Thetis and SA 83 north of Iraklion, Crete. |
| 1945 | Thorough (P 324) | HMS Thorough sinks a Japanese coaster with gunfire off Bali. |
