Dučić went into exile in the United States in 1941 following the German invasion and occupation of Yugoslavia, where he joined his relative Mihajlo (Michael) in Gary, Indiana. From then until his death two years later, he led a Chicago-based organization, the Serbian National Defense Council (founded by Mihailo Pupin in 1914) which represented the Serbian diaspora in the US. During these two years, he wrote many poems, historical books and newspaper articles espousing Serbian nationalist causes and protesting the mass murder of Serbs by the pro-Nazi Ustaše regime of Croatia. In Yugoslav school anthologies immediately after