Dec. 4--Russians win at Lodz; Germans have suffered heavy losses in Poland; Allies land troops in Montenegro.
Dec. 5--Germans, reinforced, form new battle line and move on Piotrkow, after losing heavily at Lodz.
Dec. 6--Germans occupy Lodz and drive wedge into Russian centre; one Przemysl fort falls; Russians shell Cracow.
Dec. 7--Russians bombard Cracow suburbs; new battle on in Poland; Russians besiege fortress of Lotzen; Germans abandon Zgier; Servians check Austrian advance.
Dec. 8--Germans again in Cracow.
Dec. 9--Servians recapture towns of Valjevo and Ushirza, and take many Austrian prisoners; Germans lose heavily in attack on Lowicz; Austrians defeated near Cracow; Russians claim that they have 750,000 Austrian and German prisoners in Russia.
Dec. 10--Servians capture many Austrians and large stores of supplies.
Dec. 11--Three German columns repulsed in Poland; Austrians defeated north of Kesmaj and Parovnitza.
Dec. 12--Servians repulse Austrians at Kosmai; Germans occupy Przanysz, but their front line is pierced; Lodz has been evacuated by the Russians.
Dec. 13--Germans are defeated in Mlawa region; Posen prepares for a siege; Austrian right wing, driven into Bosnia by the Servians, is attacked by Montenegrins.
Dec. 14--Servians reoccupy Belgrade; Austrians reoccupy Dukla in the Carpathians and capture 9,000 Russians; Germans gain in Northern Poland.
Dec. 15--Austrians abandon Belgrade without a battle; Germans rush fresh troops to the Vistula; Austrians recross Carpathians into Galicia and drive Russian left back toward the San River.
Dec. 16--King Peter enters Belgrade at head of an army; Servian General Staff announces that country is free of invaders; Russians have new army in Warsaw.
Dec. 17--Germans report Russian offensive against Silesia and Posen to be completely broken; battle at Sochaczew; Austrians have success in West Galicia.
Dec. 18--Russians admit falling back and shifting battle lines, but they deny defeat; Russians win in Galicia between Sanok and Lisko; Austrians announce capture of Piotrkow and Przedborz.
Dec. 19--Germans capture Lowicz; battle on the Bzura; fighting in Galicia; Russians hold lines on Dunajec River against spirited attacks; Austria claims to hold all West Galicia.
Dec. 20--Von Hindenburg follows up his success at Lowicz; German wedge driven further toward Warsaw; Russians cross the Bzura and destroy bridges behind them; Death's Head Hussars reported as having been caught in a Russian trap and almost annihilated; Servians and Montenegrins again invade Bosnia.
Dec. 21--Russians claim that Germans are being pursued into German territory; both sides claim advantages in Poland.
Dec. 22--Russian Army menaces Thorn-Allenstein-Insterburg Railroad; Germans re-form to protect it; von Hindenburg's left threatened by a new invasion of Germany; Germans cross branches of Bzura and Rawka Rivers; Austrians are defeated in the Carpathians.
Dec. 23--Austrians defeated in Carpathians and Southern Galicia.
Dec. 25--Movement of civilians to interior of East Prussia.
Dec. 26--Russians gain in South.
Dec. 28--Russians have raised the siege of Cracow to shatter Austrian armies attempting flank movement; Russians believe German attack on Warsaw has been checked.
Dec. 30--Germans retreat over the Bzura; Russians advance in South Poland.
Dec. 31--Germans claim to have taken 136,000 prisoners, 100 cannon, and 300 machine guns in Poland since November; reports from Petrograd state that the Germans lost 200,000 men at the Bzura.
Jan. 1--Russians invade Hungary; Germans in Poland move south; Austrian Army split by Russian operations in Carpathian region.
Jan. 2--Germans commence offensive movement against Kielce; Germans fortify captured Polish towns.
Jan. 3--Germans capture Bolimow; German advance on Kielce fails, as well as German advance between Bzura and Rawka Rivers; Russians take thousands of Austrian prisoners and sweep through Bukowina; Germans rush to defend Cracow.
Jan. 4--Russians occupy Suczawa; Cracow again threatened.
Jan. 5--Russians defeat Austrians in Uzsok Pass and prepare to invade Transylvania; Germans renew activities along the Vistula.
Jan. 6--New Russian army to take offensive against Germans at Mlawa; rain is interfering with many field operations; Germans help Austrians check advance against Cracow.
Jan. 7--Mud is hampering Germans.
CAMPAIGN IN WESTERN EUROPE.
Oct. 16--Germans occupy Ostend; battle line reaches the sea; Allies gain near Lille; French are near Metz; Allies check Germans in attempt to reach Dunkirk.
Oct. 17--Germans advancing again on Dunkirk; sharp fighting in Alsace; British take Fromelles; Allies take Fleurbaix and claim gains on line from Ypres Canal to the sea.
Oct. 18--Announcement that Allies' left has pushed forward thirty miles; they retake Armentieres; battle near Nieuport; Belgians repulse German attacks at River Yser; French repulse attack on St. Die and cut railroad in Alsace; Germans evacuate Courtrai; German forces in Bruges move toward French frontier.
Oct. 19--Allies advance between Nieuport and Dixmude; fighting from Ostend to Lille.
Oct. 20--Germans gain near Lille; Allies report recapture of Bruges.
Oct. 21--Allies repulse German attacks at Nieuport, Dixmude, and La Bassee; heavy fighting on the Yser; Germans gain near Lille.
Oct. 22--Battling on the coast; Allies helped by their fleets; cavalry battle at Lille.
Oct. 23--German right wing reinforced and gains ground at La Bassee; Allies gain near Armentieres; French retake Altkirch; heavy fighting between the Ghent-Bruges line and Roulers.
Oct. 24--French gain at Nieuport, but lose ground near Dixmude and La Bassee; desperate fighting along Yser Canal.
Oct. 25--Germans cross Yser Canal near Dixmude; Allies press Germans at Ostend; French gain near Lille and they claim command of German line of communication near St. Mihiel; battle at Nieuport.
Oct. 26--German advance checked on the Yser; fighting at Nieuport.
Oct. 27--Allies capture Thourout; fierce fighting on the Yser Canal; Allies claim that Germans have been driven across the eastern frontier near Nancy.
Oct. 28--Allies repulse night attack near Dixmude; they make gains in Ypres region and between La Bassee and Lens.
Oct. 29--Allies gain near Ostend; Germans gain west of Lille and southwest of Verdun; Germans dig intrenchments near Thielt.
Oct. 30--Belgians flood lower valley of the Yser River and compel Germans to withdraw; Germans gain in Argonne region.
Oct. 31--Allies yield ground in Belgium; Germans take two towns south of Ypres; they have success near Soissons; fighting around Verdun.
Nov. 1--Germans reinforced in Belgium; their advance made difficult by floods along the Yser; Allies take Mariakerke and are near Ostend; Allies cross the Yperlee and occupy Bixschoote.