 Nyora kupfuurira kweiyi ndima - Mushure mekupera kweHondo Yenyika I, iyo yaakasangana nayo pakati pa1914 na1917 semutevedzeri, akapihwa Iron Cross Yekutanga Kirasi EK I, kutanga kuEastern Front, uye gare gare kusvika pakutapwa kwake muna Kubvumbi 1917 muFrance, Osthold akatanga kudzidza sainzi yezvematongerwo enyika muKönigsberg muna 1921. Asati awana dhigirii rake rezvezvematongerwo enyika muna 1926 muMünster aine rondedzero pamusoro pehukama pakati peMarxist socialism neGerman nyika pfungwa muHondo Yenyika I, Osthold aive akabatanidzwa zvakanyanya muGerman nyika kufamba mukuwedzera kune rake basa rehunyanzvi. Senhengo yeStahlhelm, yaizivikanwa kuva yakabatana zvikuru neDNVP, akanga, pakati pezvimwe zvinhu, apinda muRuhrkampf. Ikoko aive wepasi pevhu kurwisa mauto eFrance kusvika pakupera kwa1923, iyo yaitsigirwawo nenhengo dzeFreikorps. Mushure mekuguma kweRuhr kurwira, Osthold akapinda mune zvematongerwo enyika, kwaakabatanidzwa muDNVP yakavambwa naAlfred Hugenberg. Mukusarudzwa kweReichstag muna May 1924, uko bato rakabuda sesimba rechipiri rakasimba ne19.5 muzana, akakundikana kupinda muparamende. Mukati memamwe makore ose enguva yeWeimar, Osthold akashanda zvikurukuru somutungamiriri mukuru weDINTA. Muchiitiko ichi akanyora basa rakakurumbira Kurwira Mweya weMushandi Wedu muna 1926, iyo vanyori vezvakaitika kare vanofunga nezvematongerwo enyika eInstitute uye kuenderera mberi kweChancellor Hans Luthers kufunga pamusoro pe Zvinoitika zvehupfumi hwemazuva ano hwehupfumi pachitendero kubva muna 1925. Basa raOsthold rinorumbidzwa zvikuru rinoratidzirwa pamusoro pezvose nekusarudzwa kwemunyori kwemafomu ezvehupfumi uye hukama hwebhizimisi hwakagadzwa muU.SA, iyo Osthold yakatsvaka kuendesa kuGermany. 