oll weg ' s ▁ob jections , ▁H inden burg ▁and ▁Lud endor ff ▁forced ▁the ▁ad option ▁of ▁un rest rict ed ▁sub marine ▁war fare ▁in ▁March ▁ 1 9 1 7 , ▁adopted ▁as ▁a ▁result ▁of ▁Hen ning ▁von ▁Hol tz endor ff ' s ▁memor and um . ▁Beth mann - H oll weg ▁had ▁been ▁a ▁rel uct ant ▁particip ant ▁and ▁opposed ▁it ▁in ▁cabinet . ▁The ▁US ▁entered ▁the ▁war ▁in ▁April ▁ 1 9 1 7 , ▁perhaps ▁the ▁in ev it ability ▁that ▁they ▁had ▁wished ▁to ▁avoid . ▁ ▁Beth mann - H oll weg ▁remained ▁in ▁office ▁until ▁July ▁ 1 9 1 7 , ▁when ▁a ▁Reich stag ▁revol t ▁resulted ▁ ▁in ▁the ▁passage ▁of ▁the ▁Social ▁Dem ocrat ▁Matth ias ▁Erz berger ' s ▁Peace ▁Resol ution ▁by ▁an ▁al liance ▁of ▁the ▁Social ▁Democratic , ▁Progress ive , ▁and ▁Centre ▁Part ies , ▁which ▁forced ▁his ▁res ignation ▁and ▁replacement ▁by ▁a ▁relatively ▁unknown ▁figure , ▁Georg ▁Michael is . ▁ ▁German ▁Revolution ▁During ▁ 1 9 1 8 , ▁German ▁support ▁for ▁the ▁war ▁was ▁increasing ly ▁challeng ed ▁by ▁strik es ▁and ▁political ▁ag itation . ▁In ▁October ▁sail ors ▁in ▁the ▁German ▁Imperial ▁Navy ▁mut in ied ▁when ▁ordered ▁to ▁set ▁sail ▁for ▁a ▁final ▁confront ation ▁with ▁the ▁British ▁Navy . ▁The ▁K iel ▁Mut iny ▁spark ed ▁off ▁the ▁November ▁Revolution ▁which ▁brought ▁the ▁war ▁to ▁an ▁end . ▁Beth mann -