10 Apr 1940
- German submarine U-4 sank HMS Thistle at Stavanger, Norway at 0213 hours, killing the entire crew of 53. ww2dbase [CPC]
- British submarine HMS Tarpon attacked a German armed merchant vessel with torpedoes 50 miles off of the Danish coast, which fought back with depth charges. Tarpon was sunk during the counterattack, killing the entire crew of 53. ww2dbase [CPC]
- German submarine U-37 torpedoed Swedish motor tanker Sveaborg 10 miles north of the Faroe Islands between Scotland and Iceland at 0215 hours, killing 5. Norwegian merchant vessel Tosca arrived to rescue the 29 survivors on and around the burning Sveaborg. At 0323 hours, U-37 returned and sank Tosca with one torpedo, killing 2. Survivors from both ships were later rescued by British armed boarding vessel HMS Northern Chief. ww2dbase [CPC]
- Henry Tizard established the Military Application of Uranium Detonation (MAUD) Committee in the United Kingdom to investigate the feasibility of an atomic weapon. ww2dbase [Operation Trinity and Manhattan Project | CPC]
- Nikolaus von Falkenhorst was mentioned in the Wehrmachtbericht daily radio report. ww2dbase [Nikolaus von Falkenhorst | CPC]
- Fleet Air Arm Skua dive bombers sank the German cruiser Königsberg in Bergen harbour in Norway. She was the first major warship to be sunk by dive bombing in the war. ww2dbase [Königsberg | AC]
- U-23 completed her eighth war patrol. ww2dbase [U-23 | CPC]
- The Icelanic parliament, Althing, granted full powers of government to the Icelandic cabinet, thus effectively declaring independence from Denmark, which was then under German occupation. ww2dbase [CPC]
- At the First Battle of Narvik, 10 German destroyers were attacked in the Ofot fjord by 5 British destroyers. 2 German destroyers, 11 merchant ships, and 1 supply ship were sunk. 2 British destroyers were lost. Both commanding officers, British Captain Bernard Warburton-Lee and German Commodore Friedrich Bonte, were killed in the action. Warburton-Lee was posthumously awarded the Victoria Cross and Bonte the Knight's Cross of the Iron Cross. ww2dbase [Invasion of Denmark and Norway | Narvik | CPC]
- Emden entered the port of Oslo, Norway and began serving as a communications ship coordinating messages between German Army, Navy, and Air Force units. ww2dbase [Emden | Oslo, Østlandet | CPC]
- Albatros escorted merchant ship Curityba as she unloaded troops on the Norwegian island of Rauøy. Upon completion of the escort mission, Albatros sailed southeast and struck the Gyren shoal southwest of Frederikstad, Norway at the speed of 20 knots. She was lost, and the survivors were taken aboard auxiliary ship V707 Arthur Dunker. ww2dbase [Invasion of Denmark and Norway | Albatros | Fredrikstad, Viken | CPC]
10 Apr 1940 Interactive Map
Timeline Section Founder: Thomas Houlihan
Contributors: Alan Chanter, C. Peter Chen, Thomas Houlihan, Hugh Martyr, David Stubblebine
Special Thanks: Rory Curtis
Please consider supporting us on Patreon. Even $1 per month will go a long way! Thank you. Please help us spread the word: Stay updated with WW2DB: |
Search WW2DB
News
- » US Government Plans to Purge WW2 Information (17 Mar 2025)
- » WW2DB's 20th Anniversary (29 Dec 2024)
- » Wreck of USS Edsall Found (14 Nov 2024)
- » See all news
Current Site Statistics
- » 1,167 biographies
- » 337 events
- » 44,601 timeline entries
- » 1,243 ships
- » 350 aircraft models
- » 207 vehicle models
- » 376 weapon models
- » 123 historical documents
- » 261 facilities
- » 470 book reviews
- » 28,520 photos
- » 367 maps
Famous WW2 Quote
"Goddam it, you'll never get the Purple Heart hiding in a foxhole! Follow me!"Captain Henry P. Jim Crowe, Guadalcanal, 13 Jan 1943
Support Us

Please consider supporting us on Patreon. Even $1 a month will go a long way. Thank you!

Or, please support us by purchasing some WW2DB merchandise at TeeSpring, Thank you!