 Nyorai mberi kweiyi ndima - Vandervelde akadanwa kuti Gurukota reHurumende muna 1914 uye akatsigira mutemo wokuramba kupindirwa kweGermany kweBelgiumMuHondo Yenyika I. Somumwe wevaSocialist vanoremekedzwa zvikuru muEurope, akakurudzira vamwe vezvematongerwe enyika nemamwe mapato kuruboshwe kutsigira hondo yairwisana neGermany. Akanyora teregiramu kuSocialist party yeRussia iyo yakadhindwazve mumapepanhau anoverengeka. Muna 1916, akapinda muhurumende yaDe Broqueville. Akanga ari mumiririri weBelgium paChibvumirano cheVersailles uye gare gare akabatanidzwa muSangano reMarudzi. Muna 1923, akabatsira kutanga Labour and Socialist International yaakatungamira kusvika muna 1938. 