Serbian Chetnik Organization

The Serbian Revolutionary Organization (Serbian: Српска револуционарна организација, romanized: Srpska revolucionarna organizacija) or Serbian Chetnik Organization (Српска четничка организација, Srpska četnička organizacija) was a paramilitary 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.

Source: Wikipedia — Serbian Chetnik Organization (CC BY-SA 4.0)