How a nomadic raiding party transformed into a professional imperial machine
Before they were a global superpower, the Ottomans were simply frontier warriors. Driven by the chaos of Mongol disruptions and Byzantine decline, this small group of Turkic nomads used steppe tactics and clever political alliances to build an army that would eventually reshape the world.
The origins of the Ottoman military lie in the unstable borderlands of Bithynia. Following the Mongol disruptions and the weakening of the Byzantine Empire, the Kayı tribe emerged as a frontier warrior society [S1:p1]. Initially, the force was composed entirely of Turkmen nomads, many of whom were led by religious orders [S2:p1]. These cavalrymen, armed with spears and bows, relied heavily on booty from raids [S2:p2]. Some warriors, known as ghazis, were assigned to border regions where they received permanent revenues from taxes on garrisoned lands, a system known as mukâṭaʿas [S2:p2].
As the state grew, the limitations of nomadic warfare became apparent. During the reign of Orhan, the ruler realized that undisciplined cavalry were ineffective for besieging large cities [S2:p3]. Furthermore, the nomadic preference for looting both enemy and friendly territories threatened internal stability [S2:p4]. To address this, Orhan established a professional standing army of salaried mercenaries, consisting of infantry called yayas and cavalry known as müsellems [S2:p4].
This new force introduced a high degree of cross-cultural cooperation. Many of these mercenaries were Christian soldiers from the Balkans who served without being forced to convert to Islam [S2:p5]. Over time, as Murad I expanded into southeastern Europe, these Christian-dominated forces became the army's core [S2:p5]. To manage the rising costs of salaries, the state transitioned to the timar system, assigning conquered lands to commanders [S2:p6]. While this provided a durable structure for 14th-century conquests, it also empowered the Turkish nobility, who used these military roles to gain political influence over the sultans [S2:p6].
Source: How the Ottoman Army Began
