Feb. 4—Von Hindenburg hurls 50,000 men at Russian lines near Warsaw.
Feb. 5—Russians reported to have killed 30,000 Germans under Gen. Mackensen; Russians recapture Gumine.
Feb. 6—General German offensive is looked for; Russians shift troops in East Galicia and Bukowina.
Feb. 7—Germans rush reinforcements to East Prussia; second line of trenches pierced by Russians near Borjimow; Austrians resume attacks on Montenegrin positions on the Drina.
Feb. 8—Russian cavalry sweeps northward toward East Prussia; Russians move their right wing forward in the Carpathians but retire in Bukowina; Germans shift 600,000 troops from Poland to East Prussia, using motor cars; Italians say that 15,000 Germans died in attempting to take Warsaw.
Feb. 9—Austro-German forces attack Russians at three points in the Carpathians; Russians begin the evacuation of Bukowina, where Austrians have had successes; Russians make a wedge in East Prussia across Angorapp River.
Feb. 10—Fierce fighting in the Carpathian passes; Russians are retreating from Bukowina.
Feb. 11—Russians fall back in Mazurian Lake district; they still hold Czernowitz.
Feb. 12—Von Hindenburg, as a result of a several days' battle, wins a great victory over the Tenth Russian Army in the Mazurian Lake region, part of the operations taking place under the eyes of the Kaiser; more than 50,000 prisoners are taken, with fifty cannon and sixty machine guns; the Russians retreat in disorder across the frontier, their loss in killed and wounded being estimated at 30,000; a second line of defense is being strengthened by the Russians; Paris announces the complete failure of German offensive in Poland.
Feb. 14—Russians check Germans in Lyck region; battle raging in Bukowina; Albanians invade Servia and force Servians to retreat from the frontier.