The military history of Slovenia spans less than a hundred years. Following the disintegration of the Austrian-Hungarian Empire at the end of World War I, the Duchy of Styria was divided between the newly established states of German Austria and the State of Slovenes, Croats and Serbs. Rudolf Maister, a Slovene major of the former Austro-Hungarian Army, liberated the town of Maribor in November 1918 and claimed it for the State of Slovenes, Croats and Serbs. After a short fight with German Austrian provisional units, the current border was established, which mostly followed the ethnic-linguistic division between Slovenes and ethnic Germans in Styria.