 The Austro-Hungarian Army exited the First World War after the Armistice of Villa Giusti was struck with the Kingdom of Italy on 3 November 1918.A National Council of Slovenes, Croats and Serbs had been formed in Zagreb in the previous month with the aim of representing the kingdoms of Croatia-Slavonia and Dalmatia, the condominium of Bosnia and Herzegovina, and the Slavic-populated areas of Carniola and Styria.On 1 November 1918 the National Council had established the Department of National Defense, which brought all Austro-Hungarian units on its territory under the command of a new National Army of Slovenes, Croats and Serbs.