 In 1938, Hungary openly repudiated the treaty's restrictions on its armed forces.With German help, Hungary extended its territory four times and doubled in size from 1938 to 1941, even fighting a short war with the newly created Slovakia.Hungary regained parts of southern Slovakia in 1938, Carpatho-Ukraine in 1939, northern Transylvania in 1940, and parts of Vojvodina in 1941.