- Kaiser Wilhelm II of Germany convened a “War Council” at Potsdam, with his military leaders. The outcome was to postpone plans for war with the Russian Empire until the near future, but to prepare the German public for an inevitable “racial war, the war of Slavdom against Germandom” in 1914 or 1915.
- The Greek submarine Delfin made the first torpedo attack in modern warfare, after sighting the Turkish cruiser Medjidieh and five escort ships.
- General Moritz von Auffenberg resigned as the War Minister of Austria, and was succeeded the next day by Count Franz Conrad von Hötzendorf.
- The Austro-Hungarian Empire issued a general mobilization to all of its military men and reservists all over the world in anticipation of war.
- The Turkish military departed Tripoli, completing its surrender of the Libyan territory to Italy.