Union of Hungary and Romania

The union of Hungary and Romania comprises proposed unsuccessful 20th-century, mostly interbellum, attempts to unite the Kingdom or Republic of Hungary with the Kingdom of Romania. Such proposals were most active in 1919 and 1920, though they had appeared somewhat earlier and continued up to World War II. == Proposals == The proposed union would have been ruled by the Romanian Hohenzollern-Sigmaringen dynasty.

Source: Wikipedia — Union of Hungary and Romania (CC BY-SA 4.0)