Northern Transylvania gouge a claw-shaped corridor through northwestern Romania, including a large Romanian-populated area, in order to incorporate this Hungarian-majority area within Hungary. Population of Northern Transylvania, as per 1930 Romanian census: Before the arbitration, in 1940, according to the Romanian estimates, in Northern Transylvania there were 1,304,903 Romanians (50,2%) and 978,074 (37,1%) Hungarians. One year later, after the arbitration, according to the Hungarian census, the population of Northern Transylvania has dissimilar ratios, it counted 53.5% Hungarians and 39.1% Romanians. Hungary held Northern Transylvania from 1940 to 1944. In 1940 ethnic disturbances between Hungarians and Romanians continued after some incidents following the
Transylvania withdrew in 271 AD, it was overrun by a succession of various tribes, bringing it under the control of the Carpi, Visigoths, Huns, Gepids, Avars and Slavs. From 9th to 11th century Bulgarians ruled Transylvania. It is a subject of dispute whether elements of the mixed Daco–Roman population survived in Transylvania through the Post-classical Era (becoming the ancestors of modern Romanians) or the first Vlachs/Romanians appeared in the area in the 13th century after a northward migration from the Balkan Peninsula. There is an ongoing scholarly debate over the ethnicity of Transylvania's population before the Hungarian conquest (see Origin of