Ottoman Armies and Military Organisation

From about 1300 to the end of the sultanate in 1922, Ottoman armies drew on provincial cavalry, salaried household troops, campaign levies and later reserve and conscript formations. The balance changed as warfare, state finances and the empire’s territories changed. An army on campaign needed more than soldiers: horses, grain, fodder, guns, powder, transport workers and trained specialists all had to reach the same route and season.

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Provincial cavalry and assigned revenue

For much of the classical period, the mounted sipahi was the central provincial soldier. The state assigned him the right to collect specified taxes from a group of villages, called a timar. That revenue paid for his horse, arms and service. The sipahi did not own the villages: the assignment connected public revenue to military duty and could be changed by the state. Larger assignments required the holder to bring additional armed, mounted retainers, or cebelü.

Local officers assembled these riders in stages. A subaşı gathered men in his district; the sanjak governor, the governor of an administrative district, joined the units, and provincial commanders inspected and combined them before they met the sultan’s field army. This chain made it possible to mobilise cavalry across a province without paying every rider from the central treasury. The system was important in Anatolia and Rumelia, while Egypt and several Arab provinces used other revenue arrangements.

Janissaries and state recruitment

The Janissaries were salaried infantry attached to the sultan’s household. They lived in barracks and were organised in companies called ortas, each with its own officers and internal routines. Their regular pay, or ulufe, was distributed every three months. By the sixteenth century, firearms had become central to Janissary equipment, and the corps’ growing numbers increased infantry’s weight in Ottoman armies. This made the corps available for central campaigns and garrison duties, while creating a continuing expense for the treasury.

Early Janissary recruitment drew on young prisoners taken in war. In the fifteenth century, the devshirme became a state-organised levy of selected Christian boys from particular communities, chiefly in the Balkans. Officials arrived with the sultan’s order and a letter from the Janissary commander, examined baptismal registers, selected eligible youths and recorded their names and families in registers before sending them in supervised groups to the capital. There, selected boys entered military or palace training. The institution was coercive and disrupted families; it was one defined route into state service, alongside provincial military obligations, paid recruitment and other forms of bondage and service in the empire. As the corps expanded from the later sixteenth century, its numbers exceeded what the levy could supply, and recruitment increasingly drew on other sources. By the mid-eighteenth century, the devshirme for Janissary service had dwindled to negligible numbers, although recruitment for palace service continued longer.

Guns, campaigning and supply

Artillery added foundries, metal, powder and specialist labour to military organisation. After Mehmed II’s conquest of Constantinople in 1453, the imperial cannon foundry at Tophane became an important centre of production. A large bombard cast for the siege was made in Edirne and then hauled toward Constantinople on thirty linked wagons pulled by sixty oxen. Hundreds of workers steadied the gun, while carpenters and assistants built temporary wooden bridges over difficult stretches. The cannon could fire only a handful of times a day and needed repair, so its value depended on a long chain of transport and skilled work as well as its impact against the walls.

Food and animal fodder required a comparable organisation. In the preparations for the second siege of Vienna in 1683, villages around Manastır, in present-day North Macedonia, supplied flour, butter and sheep for soldiers, and barley and straw for riding animals. Under nüzul, districts along a campaign route owed grain in kind; under sürsat, they had to bring supplies to designated military stations and sell them at set prices. Manastır also supplied saltpetre and sulfur for gunpowder; these were processed in Ohrid and sent to the powder works at Thessaloniki. Local registers and officials coordinated what was collected, processed, transported and delivered.

Long campaigns also affected people after armies moved on. In late-sixteenth-century Anatolia, the Celali rebellions drew in some dismissed or displaced timar cavalry and paid armed followers, alongside other political and economic grievances. The fate of those military actors was connected to the state’s recruitment, land assignments and changing demand for soldiers.

Fleets and maritime forces

The navy extended Ottoman military operations to Mediterranean islands, coastal fortresses and maritime supply routes. Istanbul’s imperial arsenal and regional yards needed shipwrights, caulkers who sealed gaps between hull planks to keep water out, timber, rope, canvas and iron fittings. A galley could row in light winds and manoeuvre near shore, but its large crew consumed food and water quickly. Rowers included men assigned as a tax obligation, paid volunteers, convicts, prisoners of war and enslaved people. Sailors, gunners and soldiers filled different jobs aboard.

During the seventeenth century, sailing warships served beside galleys; they required more sailors and gunners for masts, rigging, batteries and stores. Steam vessels in the nineteenth century added engines, coal, engineers and stokers. Regulations issued in 1701 specified staffing and pay aboard sailing ships, while a naval geometry room opened at the arsenal in 1775 and a school for shipbuilding engineering and navigation followed in 1795. These changes linked the fleet to the same questions of procurement, training and supply that shaped the land forces.

New formations and conscription

After the costly wars of the late eighteenth century, Selim III began the Nizam-ı Cedid, or New Order, reforms in 1792. They created a new trained force with separate financing, barracks and technical schools for engineers and artillerymen. The Janissaries and older corps remained in service, so the new and old systems competed for funds and authority. Resistance culminated in Selim’s deposition and the abolition of the new force in 1807.

In 1826 Mahmud II abolished the Janissary corps after a final uprising and formed the Asâkir-i Mansûre-i Muhammediyye, a new central army organised into infantry units and trained in barracks. The redif, established from 1834, added reserve battalions in provincial districts: men were selected locally, trained periodically near home and called up to support the regular army or maintain internal security. An 1843 regulation divided the forces into regular troops, reserves, auxiliaries and irregulars. Recruitment, service terms, schools and provincial administration continued to change through the nineteenth century, as the army mobilised for the empire’s final wars before the sultanate ended in 1922.