The Serbian Revolutionary Organization or Serbian Chetnik Organization was a paramilitary revolutionary organization with the aim of liberation of Old Serbia from the Ottoman Empire. Its Central Committee was established in 1902, while the Serbian Committee 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 Struggle for Macedonia, a series of social, political, cultural and military conflicts in the region of Macedonia; its operations are known as Serb Action in Macedonia.

The Macedonian Struggle was a series of social, political, cultural and military conflicts that were mainly fought between Greek and Bulgarian subjects who lived in Ottoman Macedonia between 1893 and 1912. The conflict was part of a wider guerilla war in which revolutionary organizations of Greeks, Bulgarians and Serbs all fought over Macedonia. Gradually the Greek and Bulgarian bands gained the upper hand. Though the conflict largely ceased by the Young Turk Revolution, it continued as a low intensity insurgency until the Balkan Wars.