ThefirstWorldWarhasbroughtseriousdisastertomankind,butithaspromotedthedevelopmentofscienceandtechnologyobjectively.Inthegame,youcancontrolacountry,byadjustingthepolicytodeveloptheeconomyortoincreasetherevenue,andtogetenoughmoneytobuyadvancedarmaments.Whenthespecifiedcitygetenoughmanpowertorecruit,throughCityArmymobilecommandyoucandevelopaglobalunifiedstrategy.IntheearlytwentiethCentury,itwasarestlessandrestlessage.Sincetheemergenceofindustrialcivilizationrepresentedbymachineandmetropolis,thecolonialpowersandtheirinterestgroupshavebegunanewfightoftheworld.Finally,aseeminglyaccidentalterroristeventhasledtothemostdevastatingwarinhumanhistory-WorldWarI.Thewarhasmadefulluseofhumancivilization,fromphysicaltochemical,toachieveaprofoundunderstandingofthenegativepowerofcivilization.Thewaroffouryearsandthreemonthsinvolvedmorethan1billion500millionofthepopulationandabout30000000ofthesoldiersdied.However,somanysacrificesstilldidnotpreventtheoutbreakoftheSecondWorldWar2.