Union of Transylvania with Romania

18 November] 1918 by the assembly of the delegates of ethnic Romanians held in Alba Iulia.

), the National Assembly of Romanians of Transylvania and Hungary, consisting of 1,228 elected representatives of Romanians in Transylvania, Banat, Crișana and Maramureș, convened in Alba Iulia and decreed (by unanimous vote): the unification of those Romanians and of all the territories inhabited by them with Romania.The declaration included 26 counties of the Kingdom of Hungary.

[4] The Resolution[5] voted by the National Assembly stipulated also the "fundamental principles for the foundation of the new Romanian State": The union was conditional, and demanded the preservation of a democratic local autonomy, the equality of all nationalities and religions.

The next day, on 2 December 1918 the High National Romanian Council of Transylvania formed a government under the name of Directing Council of Transylvania, Banat and the Romanian Lands in Hungary [ro], headed by Iuliu Maniu.

This territory was smaller than that promised by the Treaty of Bucharest[11] or claimed by the declaration of union in 1918,[12] or demanded officially by the Romanian Government[13] in the peace conference.

Romanian troops marching in Transylvania
Romanians in the Kingdom of Hungary according to Hungarian census in 1890
Timeline of the borders of Romania, 1859–2010
The Great National Assembly of Alba Iulia (December 1, 1918)
First page of Transilvania newspaper from December 1918, referring to the event
The Resolution of the National Assembly
Protest of the Transylvanian National Council in Kolozsvár (Cluj) on December 22, 1918
Romanian postcard issued c. 1918–1919. Note the unusual shape of the western borders of Romania. The country is supposed to include all Maramureş , a bigger part of Crişana , with the possibility of having all Banat (the white area). The definitive borders were established only in 1920.
King Ferdinand and Queen Marie in Transylvania (1921)