Editing Leitha (section)

==Historic border==
After the [[Hungarian conquest of the Carpathian Basin]] in the late 9th century, the [[Hungarian people|Magyar]] horsemen dared further [[Hungarian invasions of Europe|invasions]] into the adjacent [[East Francia|East Frankish]] lands, until they were finally defeated by King [[Otto I, Holy Roman Emperor|Otto I]] in the 955 [[Battle of Lechfeld]]. Thereafter the forces of the Bavarian duke [[Henry II, Duke of Bavaria|Henry the Wrangler]] gradually re-conquered the lands beyond the [[Vienna Woods]] up to the Leitha River, where about 976 the [[March of Austria]] (''[[Name of Austria|Ostarrîchi]]'') was established under the [[House of Babenberg|Babenberg]] margrave [[Leopold I, Margrave of Austria|Leopold I]].

[[File:Shallows along the Leitha River.jpg|thumb|Shallows along the Leitha River near [[Lanzenkirchen]]]]

Around the turn to the 2nd millennium, the Hungarian frontier (''Gyepű'') ran along the Leitha shore, from 1156 onwards it formed the eastern border of the [[Duchy of Austria]] with fortresses erected at Wiener Neustadt, Bruck and [[Hainburg an der Donau|Hainburg]]. The last Babenberg duke [[Frederick II, Duke of Austria|Frederick II of Austria]] was killed in the 1246 [[Battle of the Leitha River]] against King [[Béla IV of Hungary]]. The course of the border was confirmed in a 1411 deed issued by King [[Sigismund, Holy Roman Emperor|Sigismund]], when his daughter [[Elizabeth of Luxembourg|Elizabeth]] married the [[House of Habsburg|Habsburg]] duke [[Albert II of Germany|Albert II of Austria]]. The placenames [[Cisleithania]], [[Transleithania]] and [[Lajtabánság]] are all derived from the Leitha River. After the [[Austro-Hungarian Compromise of 1867]], which created the [[Austria-Hungary|Dual Monarchy]], ''Transleithanien'' ("beyond the Leitha") was the [[Vienna|Viennese]] colloquial word for the region beyond the Leitha (meaning Hungary or the [[Kingdom of Hungary]]), while ''Cisleithanien'' ("on this side of the Leitha") denoted the Austrian lands. These names reflected the Viennese and Austrian perspectives towards the rest of the [[Austria-Hungary|Empire]], because Vienna lay on 'this' side, and the other half, Hungary, lay on 'that' side.<ref>German Wikipedia</ref> Nevertheless, the Leitha did not form the entire border between the two: for instance [[Galicia (Central Europe)|Galicia]] and [[Bukovina]], which were part of Cisleithania, were north-east of [[Hungary]]. Likewise, the [[Morava (river)|Morava]] River formed the border between Cisleithanian [[Moravia]] and the Transleithanian lands of present-day [[Slovakia]] ([[Upper Hungary]]).

[[File:Wampersdorf Leitha 40294.jpg|thumb|left|Leitha bridge between Wampersdorf ([[Pottendorf]] municipality) in Lower Austria and [[Wimpassing an der Leitha|Wimpassing]] (''Vimpác'') in Burgenland]]Upon the dissolution of Austria-Hungary after [[World War I]], the 1920 [[Treaty of Trianon]] adjudicated the West Hungarian territory of the proclaimed [[Lajtabánság]] (Leitha [[Ban (title)|Banat]]) to the [[First Republic of Austria|Republic of Austria]] (as Burgenland), whereby the course of the river became an inner Austrian border.