Nikola Pašić in the context of "Dragutin Dimitrijević"

The Yugoslav Committee (Croatian: Jugoslavenski odbor, Slovene: Jugoslovanski odbor, Serbian: Југословенски одбор, romanized: Jugoslovenski odbor) was a World War I-era, unelected, ad-hoc committee. It largely consisted of émigré Croat, Slovene, and Bosnian Serb politicians and political activists whose aim was the detachment of Austro-Hungarian lands inhabited by South Slavs and unification of those lands with the Kingdom of Serbia. The group was formally established in 1915 and last met in 1919, shortly after the breakup of Austria-Hungary and the establishment of the Kingdom of Serbs, Croats and Slovenes, which was later renamed Yugoslavia. The Yugoslav Committee was led by its president, the Croat lawyer Ante Trumbić, and, until 1916, by Croat politician Frano Supilo as its vice president.

The members of the Yugoslav Committee had different positions on topics such as the method of unification, the desired system of government, and the constitution of the proposed union state. The bulk of the committee members espoused various forms of Yugoslavism – advocating for either a centralised state or a federation in which lands constituting the new state would preserve a degree of autonomy. The committee was financially supported by donations from the Croatian diaspora, and by the government of the Kingdom of Serbia, led by Nikola Pašić.

The Corfu Declaration (Serbo-Croatian: Krfska deklaracija, Крфска декларација) was an agreement between the prime minister of Serbia, Nikola Pašić, and the president of the Yugoslav Committee, Ante Trumbić, concluded on the Greek island of Corfu on 20 July 1917. Its purpose was to establish the method of unifying a future common state of the South Slavs living in Serbia, Montenegro and Austria-Hungary after the First World War. Russia's decision to withdraw diplomatic support for Serbia following the February Revolution, as well as the Yugoslav Committee's sidelining by the trialist reform initiatives launched in Austria-Hungary, motivated both sides to attempt to reach an agreement.

Pašić and Trumbić's positions were disparate. Pašić advocated for a centralist government, while Trumbić argued for a federal state, leaving significant powers to federal units and safeguarding national rights. The resulting declaration glossed over the matter of the system of government. As a compromise, it specified only that the common Kingdom of Serbs, Croats and Slovenes would be a constitutional monarchy ruled by the currently reigning Serbian Karađorđević dynasty, deferring most questions to a future Constitutional Assembly. During the discussions, which lasted 35 days, Trumbić had little support for his view from the other members of the Yugoslav Committee, who were preoccupied with the threat posed by Italy, which had been promised territory under the 1915 Treaty of London.