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1、History CausesofWorldWarIGrade5SocialStudiesOnlineBlueprintSkillExplainthecausesoftheWorldWarI.15thInfantryRegimentNewYorkNationalGuardHereareAfricanAmericansoldiersfromthe15thInfantryRegimentoftheNewYorkNationalGuardinFranceduringWorldWarI.WorldWarI(1914–1918)Imperial,territoria
2、l,andeconomicrivalriesledtothe“GreatWar”betweentheCentralPowers(Austria-Hungary,Germany,Bulgaria,andTurkey)andtheAllies(U.S.,Britain,France,Russia,Belgium,Serbia,Greece,Romania,Montenegro,Portugal,Italy,andJapan).About10millioncombatantskilled,20millionwounded.ThewarBeginsAustria
3、nArchdukeFrancisFerdinandandwifeassassinatedinSarajevobySerbiannationalist,GavriloPrincip(June28).AustriadeclareswaronSerbia(July28).GermanydeclareswaronRussia(Aug.1),onFrance(Aug.3),invadesBelgium(Aug.4).BritaindeclareswaronGermany(Aug.4).GermansdefeatRussiansinBattleofTannenber
4、gonEasternFront(Aug.).FirstBattleoftheMarne(Sept.).Germandrivestopped25milesfromParis.Byendofyear,warontheWesternFrontis“positional”inthetrenches.1915GermansubmarineblockadeofGreatBritainbegins(Feb.).DardanellesCampaign—BritishlandinTurkey(April),withdrawfromGallipoli(Dec.–Jan.19
5、16).GermansusegasatsecondBattleofYpres(April–May).LusitaniasunkbyGermansubmarine—1,198lost,including128Americans(May7).OnEasternFront,GermanandAustrian“greatoffensive”conquersallofPolandandLithuania;Russianslose1millionmen(bySept.6).“GreatFallOffensive”byAlliesresultsinlittlechan
6、gefrom1914(Sept.–Oct.).BritainandFrancedeclarewaronBulgaria(Oct.14).May17,1915May7,1915broughttheUnitedStatesintoWorldWarI.AGermansubmarinesanktheBritishoceanlinerLusitaniaoffthecoastofIreland.Morethan1,000passengerswerekilled,including128Americans.ThepeopleoftheUnitedStatesweres
7、hocked!Wilsondidnotdeclarewar,butinsteadaskedGermanyforanapology,fordamagestobepaid,andforapromisenottoattackanymorepassengerships.ItalythenenteredthewarfortheAlliesandattackedAustria-Hungaryfromthesouth.SinkingtheLusitania:1915InFebruary,1915,theGermangovernmentannouncedanunrest
8、rictedwarfarecampaign.Thismeantthatanysh
