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.
It was easy to represent the Entente as having betrayed the interests of Serbia and her kinsmen: and as for a time the Pasic Cabinet, in deference to the narrowly Orthodox influences then all powerful at Petrograd, was prepared to limit its claims to the mainly Serb and Orthodox provinces of Bosnia and Slavonia, and to leave the Catholic Croats and Slovenes to their fate, there was during the summer a certain revulsion of feeling in favour of Austria-Hungary, who appointed a Serb Orthodox frontiersman (Granicar), General Boroevic, to the chief command on the Isonzo front.