 Complete the following phrase:  The Serbian Revolutionary Organization  or Serbian Chetnik Organization Српска четничка организација  Srpska četnička organizacija was a revolutionary organization with the aim of liberation of Old Serbia Kosovo and Macedonia from the Ottoman Empire in the vilayets of Kosovo, Manastir and Salonika. Its Central Committee Централни одбор  Centralni odbor was established in 1902, while the Serbian Committee Српски комитет  Srpski komitet was established in September 1903 in Belgrade, by the combined Central Boards of Belgrade, Vranje, Skopje and Bitola. Its armed wing was activated in 1904. Among the architects were members of the Saint Sava society, Army Staff and Ministry of Foreign Affairs. It operated during the 