Kammala jumla mai zuwa: Wani jami'in aikin soja na Romaniya wanda ya yi suna a lokacin yakin basasa.
Tawayen manoma na 1907 da yakin yakin duniya na Romanian, Antonescu mai adawa da yahudawa ya nuna juyayi ga ƙungiyoyin masu tsattsauran ra'ayi da masu tsattsauran ra'ayi na National Christian da Iron Guard don yawancin lokacin tsakanin. Ya kasance mai ba da shawara na soja a Faransa kuma daga baya Shugaban Babban Jami'in, ya yi aiki na ɗan gajeren lokaci a matsayin Ministan Tsaro a cikin majalisar Kirista ta Octavian Goga da kuma majalisar Cristea ta farko, inda ya kuma yi aiki a matsayin Ministan Jirgin Sama da Jirgin Ruwa. A ƙarshen 1930s, matsayinsa na siyasa ya kawo shi cikin rikici tare da Sarki Carol II kuma ya kai ga tsare shi. Duk da haka Antonescu ya tashi zuwa siyasa a lokacin rikicin siyasa na 1940, kuma ya kafa Jihar Legionary ta kasa, haɗin gwiwa tare da jagoran Iron Guard Horia Sima. Bayan shiga Romania cikin kawance da Nazi Jamus da kuma tabbatar da amincewar Adolf Hitler, ya kawar da Guard a lokacin Legionary Rebellion na 1941. Baya ga kasancewa Firayim Minista, ya yi aiki a matsayin Ministan Harkokin Wajensa da Ministan Tsaro. Ba da daɗewa ba bayan Romania ta shiga Axis a cikin Operation Barbarossa, ta dawo da Bessarabia da Arewacin Bukovina, Antonescu ya kuma zama Marshal na Romania.