Gau (territory) Austria in 1938, the country, briefly renamed "Ostmark" between 1938 and 1942, was sub-divided into seven "Reichsgaue". These had boundaries broadly the same as the former Austrian "Länder" (states), with the Tyrol and Vorarlberg being merged as "Tyrol-Vorarlberg", Burgenland being divided between Styria and "Lower Danube" ("Niederdonau", the renamed Lower Austria). Upper Austria was also renamed "Upper Danube" ("Oberdonau"), thus eliminating the name of "Austria" ("Österreich" in German) from the official map. A small number of boundary changes also took place, the most significant of which was the massive expansion of Vienna's official territory, at the expense of "Lower Danube".
Burgenland Croatian Slovakia, southern Poland and southern Czech Republic are often also called Burgenland Croats. They use the Burgenland Croatian written language and are historically and culturally closely connected to the Austrian Croats. The representatives of the Burgenland Croats estimate their total number in all three countries and emigration at around 70,000. Burgenland Croatian was the language of Croatian refugees who fled Croatia during the Turkish Wars and settled in the western part of what was then Hungary, the area where they still live. Burgenland Croats included speakers of all three dialects of the Serbo-Croatian language (Shtokavian, Chakavian and Kajkavian), with the