Transylvania modern Romania. The plateau is almost entirely surrounded by the Eastern, Southern and Romanian Western branches of the Carpathian Mountains. The area includes the Transylvanian Plain. Other areas to the west and north are widely considered part of Transylvania. In common reference, the Western border of Transylvania has come to be identified with the present Romanian-Hungarian border, settled in the 1920 Treaty of Trianon, though geographically the two are not identical. Ethnographic areas: The area of the historical Voivodeship is . The regions granted to Romania in 1920 covered 23 counties including nearly (102,787–103,093 km in Hungarian sources and 102,200
History of Transylvania the successful Aster Revolution in Budapest brought the left liberal, pro-Entente count Mihály Károlyi to power as prime minister of Hungary. Influenced by Woodrow Wilson's pacifism, Károlyi ordered the disarmament of Hungarian Army. The Károlyi government outlawed all Hungarian armed associations and proposals intending to defend the country. The resulting Treaty of Bucharest was denounced in October 1918 by the Romanian government, which then re-entered the war on the Allied side and advanced to the Mureș (Maros) river in Transylvania. The leaders of Transylvania's National Party met and drafted a resolution invoking the right of self-determination (influenced by Woodrow Wilson's