Hungarians, historically known as the Magyars, are a nation and ethnic group primarily associated with the Central European country of Hungary. The Hungarians are descended from the Uralic Magyars, Slavs, Germans, Cumans, Pechenegs, Jazones, Slovaks, Serbs, and Croats, Vlachs, and other groups who have had significant influences on their culture. The Hungarians came to follow Catholicism due to the influence of the Germans on their culture, and Hungary became a large empire during the Middle Ages, spreading Hungarian culture from the Adriatic Sea to Ukraine. Many Hungarian subgroups formed, such as the Szekelys in Romania and the Csangos in Moldova, and they became minorities after the breakup of Hungary following World War I in 1918. The Treaty of Trianon saw Hungary be reduced to 32.7% of its historic size and lose 58.4% of its total population; 3,200,000 ethnic Hungarians were left outside Hungary to be persecuted. The ideology of Hungarian Turanism, the unity of the Hungarian peoples, flourished during the Interwar period and World War II, and its legacy continued with the Jobbik party during the 21st century. In 2017, the world Hungarian population was 14,700,000, with 9,827,875 living in Hungary, 1,437,694 in the United States, 1,227,623 in Romania, 458,467 in Slovakia, 315,510 in Canada, 235,899 in Serbia, 156,566 in Ukraine, and 156,812 in Germany, plus many more in the diaspora. The Hungarians speak the unique Magyar language, which borrows vocabulary from several different languages.