SchlieffenPlanwasGermanFieldMarshallAlfredvonSchlieffenmistakenlypredictedthemobilizationofRussia.ThekeyofSchlieffenPlanwasfast,usedthedifferenceoftimeFranceandRussiamobilizeanddefeatthesetwocountries.
ThedetailofSchlieffenPlanwasconquerthepoliticalandeconomiccenterofFrance,Paris.Inordertodothat,GermanywouldhavetodetourbyBelgiumandattackFrancebyWest,thereasonwhyGermanyneededgothroughBelgiumwastoavoidthefortressesofFrance.SchlieffenpredictedtotakeParisby39daysto6weeks,thatisthepredictionofRussiamobilizetime.
ThereasonwhySchlieffenPlanhadfailedwasbecausetheplanwasmadein1905andthewarstartedin1914.RussiaalreadyrecoveredfromtheRusso-JapaneseWar,andtheymobilizemuchfasterthanGermanyeverpredicted,Russiamobilizedlessthan3weeks.DuringthistimeGermanywasnotevendefeatedthemainforceofFrance,andtheysoonstuckedinthe"twofronts"conflict.WhenGermanycouldnotfinishthewarinshortterm,thenitactuallyproclaimedGermany'slossofFirstWorldWar.
中文简单点来说就是德国佬错误预测了毛子的动员时间,结果双线作战,而施里芬计划需要德国短时间获胜,所以其实在俄国动员完成加入战争那一刻,德国基本就输了,因为德国根本没有准备好打长时间战争