Hungary–Romania border

The border has been stable since the end of World War II, and is no longer officially in dispute between the countries.

Prior to World War I, the eastern and southern Carpathian Mountains formed a natural border between the Austro-Hungarian Empire and Romania.

During that war the part of Transylvania south of the Maros (Mureș) and east of the Szamos (Someș) had been occupied by Romania forces at the time of the cease-fire agreement of Belgrade signed on 13 November 1918.

[5] On 1 December 1918, the Great National Assembly of Alba Iulia declared union with the Kingdom of Romania.

[7] In the treaty Romania recovered all of Transylvania (including parts of Maramureș, Banat and Crișana),[8][9] Briefly during World War II, Northern Transylvania (including part of Maramureș and Crișana) was returned to Hungary under the Second Vienna Award in 1940.

New borders of Austria-Hungary after the treaties of Trianon and Saint Germain . (1919–1920), showing portions transferred to Romania.
Romania's territorial losses in the summer of 1940, showing Northern Transylvania being ceded to the Kingdom of Hungary
Hungarian–Romanian border (red)
Romania Border Monument at the tripoint with Hungary and Ukraine on the banks of the river Tur . Located in forest.