12 June

1915

 * Austro-Germans cross the Dniester at Kolomea.
 * Germans attack north of Shavli, north of Przasnysz, on the Bzura and at Mosciska (Galicia).
 * Italians make progress in the Carnic Alps. Malborghetto bombarded.
 * Great Britain informs Germany through the U.S. Ambassador that submarine prisoners are now treated as ordinary prisoners.