12 August

1914

 * Belgium: Germans seize Huy (Meuse), but are checked at Haelen and Dinant.
 * Bosnia: Serbians and Montenegrins vainly attack Vishegrad.
 * Great Britain declares war on Austria-Hungary.
 * Turkey: Reported purchase of the German cruisers Goeben and Breslau.

1915

 * Zeppelin air raid on East Suffolk and Essex begins.
 * Russians evacuate Sokolov, Syedlets, Lukow (east of Warsaw); material evacuated from Riga.
 * Austro-German armies in touch west of Brest-Litovsk and form unbroken line. Germans driven back beyond Aa, south-west of Mitau.
 * Russians capture Kovarsk and Toviamy (west-south-west of Dvinsk).
 * Italians leaving Turkey.
 * Serbians retaliate for Austrian bombardment of Belgrade by bombarding Semlin and Panchevo.
 * Russian left wing re-occupies Alashgerd (Armenia).
 * No Naval engagement between German and Russian fleets near Oesel (Riga).
 * French cruiser shells and destroys German munition factory at Jaffa.
 * 10,000,000 francs in gold deposited in one week in Banque de France.
 * USA reply to Austria affirms export of munitions of war not against laws of neutrality.
 * King Albert made Colonel-in-Chief of 5th Dragoon Guards.