 Nyora kupfuurira kweiyi ndima - Muna 1868 akava muongorori weboka revarwi veMainz uye lieutenant general. Mushure mekutanga kweHondo yeFrance nePrussian, Kummer akapihwa rairo ye3rd Reserve Division musi waAugust 10, 1870, iyo yaakapinda nayo muKukombwa kweMetz kusvika pakuzvipira kwayo. Chikamu chake chakarwa muHondo yeNoisseville ndokutakura mutoro weHondo yeBellevue. Pashure pokuwa kweMetz musi waOctober 27, 1870, akanga ari mukuru mukuru weMetz kusvikira musi waNovember 6. Boka rake reLandsturm rakapiwa basa rokuendesa vasungwa kure ndokugara kumba. Panzvimbo pezvo, Kummer akatora chikamu chechi 15 musi waOctober 27, 1870. Iri raiva rutivi rweVIII Army Corps First Army kuchamhembe kweFrance. Akarwa ikoko zvinobudirira muHondo yeAmiens uye Hondo yeHallue uye akatungamira kufambira mberi pa Bapaume, izvo zvakatungamira kuHondo ye Bapaume. Pashure pokukunda paSaint-Quentin pana January 19, 1871, kurwa kwakanga kwapera nokuda kwake. Akanga atogamuchira mashizha eoki nokuda kwePour le Mérite pana January 12, 1871. 