Yeğen Osman Pasha

[1] After being commander of sekban (peasant mercenaries) units in Anatolia, he was appointed first to position of sanjakbey and serçeşme of the Sanjak of Karahisar-i Sahib.

To satisfy appetites of ambitious Yeğen Osman and win his support the sultan made him beylerbey of Rumelia Eyalet with seat in Sofia[7] and responsible for exceptionally important front toward Holy League.

[12][13] According to one letter written by Catholic bishop Peter Bogdani, Yeğen Osman Pasha threatened to cut off the head of Archbishop of Peć and Serbian Patriarch Arsenije III Crnojević because he received money from Austrians to instigate anti-Ottoman rebellion of Orthodox Serbs.

[17][16] When the Holy Roman Empire forces besieged Belgrade in 1688, the emperor sent a letter to Yeğen Osman and offered him Wallachia to desert Ottomans and switch to their side.

[19] When Yeğen Osman realized that his forces were outnumbered, he burned his camp and both Serb populated Belgrade suburbs on Sava and Danube.

[20] From Niš he wrote to porte reports about the siege and requested military and financial support to defend Belgrade and to annihilate rebellious rayah.

However, in a war council in Edirne, Selim I Giray the Crimean khan and a vassal of the Ottoman Empire called the Ottoman Porte to execute Osman [22] When this happened, the incumbent grand vizier outlawed the sekban corps, threatening soldiers who proved unwilling to disperse with execution, and a civil war ensued.

[3] The sekbans gained the upper hand, but a further volte-face of the Ottoman central administration saw Yeğen Osman be captured and executed.