1945 ⟶ Dönitz Orders U-boats to Cease Operations
Karl Dönitz orders all U-boats to cease operations.Year
1939
1940
1942
1945
🤿 Dönitz Relaxes U-Boat Prize Rules, Orders Unrestricted Submarine Warfare
The Führer der Unterseeboote Karl Dönitz greatly relaxes prize rules ordering the sinking without warning of merchant ships that send signals by radio and the attack on smaller Allied passenger ships. He also opens the war on French shipping.⟶

GermanyU-boatsSubmarine WarfareKarl DönitzAtlanticWar at SeaMerchant ShipsWorld War IIUnrestricted Warfare
🚢 Heavy Convoy Losses to U-boats
Heavy convoy losses to U-boats in the Atlantic.⟶
AtlanticU-boatsGerman NavyConvoy WarfareNaval WarfareSubmarine WarfareBattle of the AtlanticMerchant Ships
🚢 Heavy Convoy Losses Due to U-boats
Very heavy convoy losses during this period as numbers of U-boats increase.⟶
U-boatsAtlanticconvoynaval warfareGermanyUKsupply linesBattle of the Atlantic
⚓ U-boats Reach US Shores: The Second Happy Time Begins
The German U-boat offensive comes closer to the US shores starting the Second Happy Time.⟶

Atlantic OceanU-boatsGerman NavyUS CoastNaval WarfareBattle of the AtlanticSecond Happy TimeSubmarines
🤿 Dönitz Orders U-boats to Cease Operations
Karl Dönitz orders all U-boats to cease operations.⟶
U-boatsGerman NavySurrenderAtlanticNaval WarfareWWIIKarl DönitzSubmarinesEnd of War