Carpatho-Ukraine declares itself an independent republic, but is annexed by Hungary the next day.
Carpatho-Ukraine or Carpathian Ukraine (Ukrainian: Карпа́тська Украї́на, romanized: Karpats’ka Ukrayina, IPA: [kɐrˈpɑtsʲkɐ ʊkrɐˈjinɐ]) was an autonomous region within the Second Czechoslovak Republic, created in December 1938 by renaming Subcarpathian Rus' whose full administrative and political autonomy was confirmed by the Constitutional law of 22 November 1938. After the breakup of the Second Czechoslovak Republic, it was proclaimed an independent republic on 15 March 1939, headed by Avgustyn Monsignor Voloshyn as President, who appealed to Hitler for recognition and support. Nazi Germany did not reply, and the short-lived state was returned to the Kingdom of Hungary, who had controlled the territory prior to World War I, crushing all local resistance by 18 March 1939.
The region remained under Hungarian control until the End of World War II in Europe, after which it was occupied and annexed by the Soviet Union. The territory is now administered as the Ukrainian Zakarpattia Oblast.