The creation of a dual monarchy, Austria-Hungary, enabled the Hungarian government to initiate a policy of suppressing the teaching of languages other than the Hungarian language in state schools. The official use of other languages than Hungarian was also discouraged. During this time, a nationalist movement arose among Slovakians. A part of this movement joined forces with a part of the Czech nationalist movement. During World War I, this movement convinced the future victorious powers to recognise a new state of Czechoslovakia after the war.