The Serbo-Croat coalition, formed on the basis of the Fiume Resolution, at once acquired the mastery in Croatia, and even when its short-lived alliance with the Hungarian coalition - in power in Hungary since April 1906 - was replaced by acute conflict in the summer of 1907, no amount of repression from Budapest could destroy its solid majority in the Croatian diet.
The Cuvaj Dictatorship. - The triumphant vindication of Mr. Supilo and his colleagues of the Serbo-Croat coalition gave a fresh incentive to the idea of unity throughout the southern Slav provinces of Austria-Hungary.
The diet of Zagreb was allowed to meet, and the Serbo-Croat coalition pursued a policy of pure opportunism, avoiding any pronouncement on matters of high policy, but buying a certain relaxation of regime in Croatia by supporting the Budapest Government and its nominee Skerlecz.
During 1919 internal politics centred in a struggle between the Radicals, who still possessed the best party machine and stood for a narrowly Serbian as opposed to a Yugoslav programme, and the newly constituted Democratic party, which absorbed most of the Serbian Opposition parties, the old Serbo-Croat coalition of Zagreb, and the Slovene Liberals.
Practically from the 8th to the 12th century the bulk of the Serbs was under either Bulgarian or Greek suzerainty, while the Serbo-Croat provinces of Dalmatia acknowledged either Venetian or Hungarian supremacy.