 Nyorai kupfuurira kweiyi ndima - Akamanikidzwa kunze kwemabasa ezvematongerwe enyika nehutungamiri hwePNL pamberi pesarudzo dzaMarch 1911, Diamandy akaisa pfungwa pabasa rake semunyori wemitambo. Akadzokera mumutambo mukuru mukati mematanho ekutanga eHondo Yenyika I, apo Romania yakachengetedza mutemo wekusarerekera pasi pePNL Prime Minister Ion I. C. Brătianu. Wokupedzisira uyu akasarudza Diamandy somumiririri wake wepamutemo kunyika dzeEntente, kwaakakurukura zvibvumirano uye zvibvumirano zvekubatsirana. Akasarudzwazve kuChamber muna 1914, apo akazviratidza kuva mutsigiri akangwarira wesungano pakati peRomania neEntente. Muzhizha ra1916, Brătianu akabvuma chibvumirano chezvematongerwo enyika nenyika, uye Romania yakapinda muhondo senyika yeEntente. Diamandy akarwa muhondo yakatevera, asi nokukurumidza akaiswa muchipatara nokuda kwechirwere chomwoyo. 