Sopron plebiscite
The Sopron area plebiscite took place on December 14-16, 1921. In this plebiscite, the residents of an area of 257 km2, comprising Sopron and eight surrounding settlements, voted on whether to remain in Hungary or to join Austria. That was the only plebiscite about the disputed borders on the territory of the former Kingdom of Hungary after the World War I, which was allowed by the Entente.