After decades of upheavals and rebellions mounted by Arab tribes in the Middle East, the Ottomans attempted to reassert centralized control over the Arab "vilayets". In 1657, they sent an expeditionary force led mostly by Arab "sipahi" officers from central Syria to reassert Ottoman authority in Nablus and its hinterland, as part of a broader attempt to established centralized rule throughout the empire at that time. In return for their services, the officers were granted agricultural lands around the villages of Jabal Nablus. The Ottomans, fearing that the new Arab land holders would establish independent bases of power, dispersed the land plots to separate and distant locations within Jabal Nablus to avoid creating contiguous territory controlled by individual clans. Contrary to its centralization purpose, the 1657 campaign allowed the Arab "sipahi" officers to establish their own increasingly autonomous foothold in Nablus. The officers raised their families there and intermarried with the local notables of the area, namely the ulama and merchant families. Without abandoning their nominal military service, they acquired diverse properties to consolidate their presence and income such as soap and pottery factories, bathhouses, agricultural lands, grain mills and, olive and sesame oil presses.