Theobald von Bethmann Hollweg4 February 1915
Germany declares submarine blockade of Britain, with all approaching ships considered targets, the start of Unrestricted Submarine Warfare
Germany · Warfare / World War, 1st. Chronological records rendered directly from the World History Database.
Germany declares submarine blockade of Britain, with all approaching ships considered targets, the start of Unrestricted Submarine Warfare
A German submarine blockade of Great Britain begins
Allied aircraft bombs Karlsruhe in retaliation for German bombing of London
This factsheet is generated from stored World History Database records matching the country, broad category, detailed category and exact Event value shown above. Duplicate display records are collapsed; database wording is otherwise preserved. Source provenance varies by record, so formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.