Nearly 95% were Slovenes and 5% Germans, while 99% of the population belonged to the Roman Catholic Church.
According to nationality, 71.54% were Germans, and 28.39% Slovenes, mostly settled in the districts adjoining the Slovene province of Carniola.
Among the Slovenes of Istria and Carniola there were also numerous arrests, and the Matica Slovenska, the chief Slovene literary society, was dissolved and its funds confiscated.
The jealously guarded secret was discovered by Mr. Supilo in Petrograd within a few days of the signature of the treaty, and the main facts becoming known in Austria-Hungary, were skilfully exploited by her to rally the Croats and Slovenes in defence of their national territory.
After affirming that the Serbs, Croats and Slovenes constitute a single nation and appealing to the right of self-determination, it declared in favour of complete national unity under the Karagjorgjevic dynasty, " a constitutional democratic and parliamentary monarchy, equality of the three national names and flags, of the Cyrilline and Latin alphabets, and of the Orthodox Catholic and Mussulman religions, equal rights for all citizens, universal suffrage in parliamentary and municipal life, and the freedom of the Adriatic to all nations."