Events
Austria Hungary declares war on SerbiaGerman mobilization, declares war on RussiaGermany declares war on FranceBritain declares war on GermanyOttoman Empire enters war, side: Central PowersBritain and France declare war on the Ottoman EmpireSinking of Lusitania2nd battle of YpresJapan declares war on GermanyFrance declares war on Austria-HungaryBritain declares war on Austria-HungaryMontenegro declares war on GermanyMontenegro declares war on Austria-HungaryAustria-Hungary declares war on BelgiumRussia declares war on the Ottoman EmpireSerbia declares war on the Ottoman EmpireMontenegro declares war on the Ottoman EmpireItaly declares war on Austria-HungarySan Marino declares war on Austria-HungaryItaly declares war on the Ottoman EmpireBulgaria declares war on SerbiaBritain declares war on BulgariaMontenegro declares war on BulgariaFrance declares war on BulgariaGermany declares war on PortugalAustria-Hungary declares war on PortugalItaly declares war on GermanyThe Ottoman Empire declares war on RomaniaBulgaria declares war on RomaniaThe United States declares war on GermanyCuba declares war on GermanyPanama declares war on GermanyGreece declares war on the Central PowersSiam declares war on Germany and Austria-HungaryLiberia declares war on GermanyChina declares war on Germany and Austria-HungaryBrazil declares war on GermanyThe United States declares war on Austria-HungaryPanama declares war on Austria-HungaryGuatemala declares war on GermanyNicaragua declares war on Germany and Austria-HungaryCosta Rica declares war on GermanyHaiti declares war on GermanyHonduras declares war on GermanyConscription introduced to BritainBolsheviks overthrow Russian government in Russian RevolutionArmistice between Russia and Central Powers is signedGermany signs the armisticeTreaty of VersaillesSiege of TsingtaoFirst use of poison gasZimmerman telegram intercepted by BritainIndian army joins warFirst battle of YpresChristmas TruceRussian mobilisationGermany invades and declares war on BelgiumAustria-Hungary declares war on RussiaSerbia declares war on GermanyU.S. declares neutralityFirst Battle of the Marne begins *Germany declares war zone around British IslesGallipolli campaign launchedRussian invasionGreat Russian RetreatWarsaw taken by Austria-Hungary troopsRussia and Italy declare war on BulgariaAllies evacuate from GallipolliGerman u-boats suspendedFirst use of tanksGreece declares war on Germany and BulgariaBucharest falls under Austria-HungaryGermany resumes unrestricted submarine warfareRussian Revolution beginsFrance, Britain and the U.S. recognizes new Russian governmentPeriods
War beginsBattle of TannenbergLate 1914First zeppelins appearBattle of VerdunBattle of JutlandBattle of the SommeFighting ended but yet unofficialSpring Offensive100 Days OffensiveBlockade of Germany
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