Slavic peoples where they spread literacy.
In 1919, after the American-Rusyns agreed with Tom� Masaryk to incorporate Carpathian Ruthenia into Czechoslovakia, the whole of Carpathian Ruthenia was occupied by Czechoslovak troops. On June 4, 1920, Mukachevo officially became part of Czechoslovakia by the Treaty of Trianon. In November 1938, a part of the territory of the former Kingdom of Hungary was re-annexed by Hungary as part of the First Vienna Award. Mukachevo was then the only town in Hungary with a Jewish majority until 1944, when all the Jews were deported to Auschwitz by the Nazi German Eichmann Commando. The Hungarian Jewish community was the last Jewish community in Europe to be subjected to deportation, and then only partially.
In the end of 1944, the Red Army stormed Carpathian Ruthenia. At first the territory was given to the reestabilished Czechoslovakia, then became part of the Soviet Union by a treaty between the two countries, later in 1945. The Soviet Union began a policy of expulsion of the Hungarian population. In 1945, the city was ceded to the Ukrainian SSR (now Ukraine). In 2002, Mukachevo has been the seat of the Roman Catholic diocese comprising
