Hungarian irredentism or Greater Hungary () are irredentist political ideas concerning redemption of territories of the historical Kingdom of Hungary. Targeting at least to regain control over Hungarian-populated areas in Hungary's neighbouring countries. Hungarian historiography uses the term "Historic Hungary" (). "Whole Hungary" () is also commonly used by supporters of this ideology. The Treaty of Trianon defined the current borders of Hungary and, compared against the claims of the pre-war Kingdom, post-Trianon Hungary had approximately 72% less land stake and about two-thirds fewer inhabitants, almost 5 million of these being of Hungarian ethnicity. However, only 54% of the inhabitants of the pre-war Kingdom of Hungary were Hungarians before World War I. Following the treaty's instatement, Hungarian leaders became inclined towards revoking some of its terms. This political aim gained greater attention and was a serious national concern up through the Second World War. Irredentism in the 1930s led Hungary to form an alliance with Hitler's Nazi Germany. Eva S. Balogh states: "Hungary's participation in World War II resulted from a desire to revise the Treaty of Trianon so as to recover territories lost after World War I. This was the basis for Hungary's interwar foreign policy." Hungary, supported by the Axis Powers, was successful temporarily in gaining some regions of the former Kingdom by the First Vienna Award in 1938 (southern Czechoslovakia with mainly Hungarians) and the Second Vienna Award in 1940 (Northern Transylvania with an ethnically mixed population), and through military campaign gained regions of Carpathian Ruthenia in 1939 and (ethnically mixed) Bačka, Baranja, Međimurje, and Prekmurje in 1941 (Hungarian occupation of Yugoslav territories). Following the close of World War II, the borders of Hungary as defined by the Treaty of Trianon were restored, except for three Hungarian villages that were transferred to Czechoslovakia. These villages are today administratively a part of Bratislava. History Background The independent Kingdom of Hungary was established in 1000 AD, and remained a regional power in Central Europe until Ottoman Empire conquered its central part in 1526 following the Battle of Mohács. In 1541 the territory of the former Kingdom of Hungary was divided into three portions: in the west and north, Habsburg Kingdom of Hungary retained its existence under Habsburg rule; the Ottomans controlled the south-central parts of former Kingdom of Hungary; while in the east, the Eastern Hungarian Kingdom (later the Principality of Transylvania) was formed as a semi-independent entity under