The Ottoman Army was reorganized along modern Western European lines during the Tanzimat modernization period and functioned during the decline and dissolution period that is roughly between 1861 (though as a unit First Army dates 1843) and 1918 end of World War I for Ottomans. The last reorganization occurred during the Second Constitutional Era.
The shift from Classical Army (1451–1606) took more than a century beginning from failed attempts of Selim III (1789) to a period of Ottoman military reforms (1826–1858) and finally Abdulhamid II period. Abdulhamid II, as early as 1880 sought, and two years later secured, German assistance, which culminated in the appointment of Lt. Col. Kohlcr. However. Although the consensus that Abdulhamid favored the modernization of the Ottoman army and the professionalization of the officer was fairly general, it seems that he neglected the military during the last fifteen years of his reign, and he also cut down the military budget. The formation of Ottoman Modern Army was a slow process with ups and downs.
Infantry were the backbone of the army. Ottoman infantry were assigned the function of infiltrating enemy lines and protecting territory gained.
The cavalry was losing its efficiency in late 19th and early 20th century. There were three cavalry units. 1 Cav., 2 Cav. and 3 Cav. These units were the successors to the Hamidiye cavalry formations, which were disestablished on August 17, 1910. These new regiments were formed into seven cavalry brigades and three independent regiments and were composed mainly of Kurds, some rural Ottomans and an occasional Armenian.
1892 was the first time a trained and organized Kurdish force was encouraged by the Sultan, Abdul Hamid II, Hamidiye (cavalry). There were several reasons as to why the Hamidiye light cavalry was created. They were intended to be modeled after the Caucasian Cossack Regiments (example Persian Cossack Brigade) and were firstly to patrol the Russo-Ottoman frontier The Hamidiye Cavalry was in no way a cross-tribal force, despite their military appearance, organization and potential. Hamidiye quickly found out that they could only be tried through a military court martial. They became immune to civil administration. Realizing their immunity, they turned their forces into “legalized robber brigades” as they stole grain, harvested fields not of their possession, drove off herds and openly stole from shopkeepers.