 Ramba uchiverenga ndima iyi - Apo Umambo hweYugoslavia hwakapinda muHondo Yenyika II pamusana pokupinda kweAxis munyika muna April 1941, Ekmečić akaramba ari munharaunda yeČapljina kusvika muna 1943. Munguva yekupinda, Nyika Yakazvimirira yeCroatia, nyika yefascist, yakavambwa; nyika nyowani yaisanganisira Čapljina. Musi wa6 Nyamavhuvhu 1941, vaUstaše vaive vatongi vakaita kuuraya kwePrebilovci, umo Ekmečić akarasikirwa nenhengo dzemhuri yake makumi manomwe neshanu, kusanganisira baba vake nasekuru. Nhengo dzakapona dzemhuri yake dzakaumba chikwata cheYugoslav Partisans resistance movement muPrebilovci. Kubva muna Gumiguru 1944 kusvika muna Chikunguru 1945, Ekmečić aive nhengo yeYugoslav Partisans. 