Towards the end of the nineteenth century living conditions of labourers in the
chiftliks deteriorated, after their Turkish owners became indebted to Greek and Jewish merchants and sold their estates, while economic divisions in the free villages deepened between poor small landholders and the wealthier notables, known as "
çorbacı", who usually allied with Turkish authorities and the Greek bishop and sided with the Greek party. Economic misery and political friction led many peasants to emigration to the
New World or to neighbouring countries, especially Bulgaria, whence they returned proselytised to the national cause. {{multiple image As prospects of social mobility cultivated by the expanded provision of education were frustrated, a number of teachers and urban professions influenced by
socialist ideas formed in 1893 in
Salonica a secret revolutionary organization aiming to gain political
autonomy for the region of Macedonia. After some name changes, it became known as the "
Internal Macedonian Revolutionary Organization", and oriented its energies towards engaging traditional
brigands and peasants in building a network of parallel institutions in Slav Macedonian villages, facing Ottoman repression and employing means of terror to cement its base. IMRO gained a mass following of peasants who attached themselves to its cause for social reasons, reaping short-term benefits by upper social strata, thanks to threat of violence by armed IMRO bands, and enchanted by the long-term promise of social reform, in particular radical agrarian reform. Having gained a stronghold in the area, the IMRO
staged an anti-Ottoman rebellion, centered around the wealthy free villages of Western Macedonia, on 20 July (O.S.) 1903. The rebellion was brutally suppressed by the Ottomans; tens of villages, mostly in the
Manastir Vilayet, were razed to the ground and thousands of uninvolved peasants sought refuge to the mountains. Following the failed
Ilinden Uprising the IMRO ultimately weakened due to a split into
pro-Bulgarian nationalist right-wing faction and a left-wing faction who favored an autonomous Macedonia as part of a
Balkan Federation. Moreover, following the
Murzsteg Agreement, article 3 of which stipulated the administrative reorganization with a view to a better grouping of different nationalities, the governments of both Greece and Bulgaria began to organize missions of armed nationalist guerrilla bands to Macedonia, composed mostly of
Cretans in the Greek case. Serbia offered material support to the
Ilinden Uprising, and after its suppression, authorities in Belgrade sought but failed to negotiate with Bulgarian leaders on sending Serbian bands into Macedonia for combined action. A Serbian Committee also had funded small groups of
chetniks, either self-organized or part of the Bulgarian revolutionary organizations active in Macedonia (
IMRO and
SMAC) in spring of 1904. Soon, hostility between the Bulgarian organizations and the
Serbian Chetnik Organization began. With the failed idea of joint actions, and growing nationalism, the government in Belgrade took over the activities of the organization. Most Greek-speaking villages remained uninvolved in the
Macedonian Struggle, which developed as a confrontation between opposing national factions mostly within the Christian Slav-speaking communities of Macedonia, leading contemporary observers to describe it as a "civil war among Christians". Amongst the primary aims of the guerrilla war was to force the Macedonian Slavs to declare themselves Greeks, Bulgarians or Serbs, this was difficult because the peasantry stubbornly refused to identify with these national causes. However, the warfare forced the peasantry to affiliate with some of the state-sponsored national identities, this decision was significantly influenced by violent threats and opportunity. The infighting tore apart these communities, as IMRO
komitadjis and rival members of Greek bands were connected with social or even family ties. Rejecting such criteria as language or race, the Greek view appealed to the "national consciousness" of non-Greeks. In practice, this translated to the Slav peasant's confessional affiliation to the Greek-Orthodox millet. Facing a population largely indifferent to national ideas, the employment of violent means by Greek guerrillas in a manner equally relentless to that of the IMRO bands managed to restrict IMRO terrorist activities. The
Young Turk Revolution in 1908 imposed a temporary stop to all guerrilla actions in Macedonia. ==Second Constitutional Era (1908–1912)==