• January 8: Germany forms a southern army to support the faltering Austrians.
• January 19: First German Zeppelin raid on British mainland.
• January 31: The first use of poison gas in WW1, by Germany at Bolimow in Poland.
• February 4: Germany declares submarine blockade of Britain, with all approaching ships considered targets. This is the start of Unrestricted Submarine Warfare.
• February 7 - 21: Second Battle of the Masurian Lakes, no gains. (EF)
• March 11: The Reprisals Order, in which Britain banned all 'neutral' parties from trading with Germany.
• March 11 - 13: Battle of Neuve-Chapelle. (WF)
• March 18: Allied ships attempt to bombard areas of the Dardanelles, but their failure causes the development of an invasion plan.
• April 22 - May 25: Second Battle of Ypres (WF); BEF casualties are triple those of Germans.
• April 25: The Allied ground assault begins in Gallipoli. (SF)
• April 26: The Treaty of London is signed, in which Italy joins the Entente.
• April 22: Poison Gas is first used on the Western Front, in a German attack on Canadian troops at Ypres.
• May 2-13: Battle of Gorlice-Tarnow, in which the Germans push Russia back.
• May 7: The Lusitania is sunk by a German submarine; casualties include 124 Americans passengers.
• June 23 - July 8: First Battle of Isonzo, an Italian offensive against fortified Austrian positions along a 50-mile front. Italy makes ten more attacks between 1915 and 1917 in the same place (The Second - Eleventh Battles of Isonzo) for no real gains. (IF)
• July 13-15: The German 'Triple Offensive' begins, aiming to destroy the Russian army.
• July 22: 'The Great Retreat' (2) is ordered - Russian forces pull back out of Poland (currently part of Russia), taking machinery and equipment with them.
• September 1: After American outrage, Germany officially stops sinking passenger vessels without warning.
• September 5: Tsar Nicholas II makes himself Russian Commander-in-Chief.
• September 12: After the failure of the Austrian 'Black Yellow' offensive (EF), Germany takes over ultimate control of Austro-Hungarian forces.
• September 21 - November 6: Allied offensive leads to Battles of Champagne, Second Artois and Loos; no gains. (WF)
• November 23: German, Austro-Hungarian and Bulgarian forces push the Serbian army into exile; Serbia falls.
• December 10: The Allies begin slowly withdrawing from Gallipoli; they complete by January 9 1916.
• December 18: Douglas Haig appointed British Commander-in-Chief; he replaces John French.
• December 20th: In 'The Falkenhayn Memorandum', the Central Powers propose to 'bleed the French White' through a war of attrition. The key is using Verdun Fortress as a French meat grinder.
Despite attacking on the Western Front, Britain and France make few gains; they also incur hundreds of thousands more casualties than their enemy. The Gallopoli landings also fail, causing the resignation of a certain Winston Churchill from British government. Meanwhile, the Central Powers achieve what looks like success in the East, pushing the Russians back into Belorussia...but this had happened before - against Napoleon - and would happen again, against Hitler. Russia's manpower, manufacturing and army remained strong, but casualties had been huge.
