secure this province in order to anchor our right flank and to advance on the lower Vistula was rendered impossible by the German tactical victory." See also First Battle of the Masurian Lakes Battle of Łomża First Battle of Przasnysz References Sources Tucker, Spencer C. The Great War: 1914–18 (1998) The Second Battle of the Masurian Lakes, 1915 Conflicts in 1915 Battles of the Eastern Front (World War I) Battles of World War I involving Russia Battles of World War I involving Germany East Prussia 1915 in the Russian Empire February 1915 events 1915 in Germany