How did the Ottoman Empire govern Iraq from 1534 to 1918?

From 1534 to 1918, Ottoman governance in Iraq evolved from a decentralized system of provinces to a more centralized administration, ultimately ending with the British occupation during World War I.123

Early Administrative Structure

Following the 16th-century conquest, the Ottomans established direct rule using traditional administrative devices, including the appointment of governors and judges, the stationing of Janissaries in provincial capitals, and the execution of cadastral surveys. The region was divided into several eyālets (provinces), such as Baghdad, Mosul, and Basra, which served as a buffer zone against Iran and unruly tribes.24

The Mamluk Era and Centralization

By the 18th and early 19th centuries, power was often held by Mamluk governors who shared authority with local tribal sheikhs and religious elites. However, Sultan Mahmud II eventually sought to curtail this autonomy, leading to the restoration of direct Ottoman rule by 1831.1

Reforms and the Vilayet System

The most significant modernization occurred under Midhat Paşa (1869–1872), who implemented the Ottoman Vilayet Law. His reforms included:
* Urban Development: Modernizing Baghdad with paved streets, a water-supply system, and the first bridge across the Tigris.5
* Economic Expansion: Promoting steamer services, dredging operations, and establishing schools and newspapers.5
* Land Reform: Attempting to register land titles under the Ottoman Land Law of 1858 to settle tribes and improve tax collection, though this often empowered tribal sheikhs as landlords.5

Ottoman rule concluded as British forces occupied the region during World War I, formally ending the empire's presence by 1918.3