declared as a Macedonian organization open to all ethnic groups in Macedonia and, earlier on, IMRO claimed that it was fighting for the autonomy of Macedonia and not for annexation to Bulgaria. However, according to some authors and historians, it later became an agent serving Bulgarian interests in Balkan politics with the aim of eventually uniting the entirety of Macedonia with Bulgaria, first in struggles against the Ottoman Empire and later against the Serbian-led Yugoslav successor state controlling the territory of Vardar Macedonia and the Greek state which controlled the southern portion of the region. One major event representing the culmination of these actions is the assassination of the Serbian King of the Kingdom of Serbs, Croats and Slovenes during the inter-war period by an IMRO sniper, likely working for Bulgarian interests. In practice, most of the followers of the IMRO were local Macedonian Bulgarians, though they also had some Aromanian allies or pro-Bulgarian supporters, like Pitu Guli, Mitre The Vlach, Ioryi Mucitano and Alexandar Coshca. Many of the members of the organization saw Macedonian autonomy as an intermediate step to unification with Bulgaria, but others saw as their aim the creation of a Balkan federal state, with Macedonia as an equal member. The IMRO ultimately weakened due to a split into a left-wing faction (federalist) and a right-wing faction (centralists) following the failed Ilinden–Preobrazhenie Uprising. Bulgarian Activity Already from 1895 the Supreme Macedonian-Adrianople Committees were formed in Sofia in order to reinforce the Bulgarian actions in Ottoman Empire. One of Komitadjis' first activities was the capture of the predominantly Greek town of Meleniko (today Melnik, Bulgaria), but they couldn't hold it for more than a few hours. Bulgarian bands destroyed the Pomak village of Dospat where they massacred local inhabitants. This kind of activity alerted Greeks and Serbians, who made a farce of the slogan "Macedonia to Macedonians", being against the constitution of Macedonia as separate state. As Bulgarian efforts intensified, they started to affect European public opinion. In April 1903, a group known as the Boatmen of Thessaloniki, with assistance from the IMRO, blew up the French ship Guadalquivir and the Ottoman Bank in Thessaloniki. In August 1903, the IMRO organised the Ilinden Uprising in Macedonia and the Adrianople Vilayet which led to the formation of the short-lived Kruševo Republic. The uprising was ultimately suppressed by the Ottoman Army with the subsequent destruction of many villages and the