Akinji

Akinji or akindji (, ; plural: "akıncılar") were irregular light cavalry, scout divisions (deli) and advance troops of the Ottoman Empire's military. When the pre-existing Turkish ghazis were incorporated into the Ottoman Empire's military they became known as "akıncı." Unpaid they lived and operated as raiders on the frontiers of the Ottoman Empire, subsisting on plunder. There is a distinction made between "akıncı" and "deli" cavalry.
History.
In war their main role was to act as advance troops on the front lines and demoralise the marching opposing army by using guerrilla tactics, and to put them in a state of confusion and shock. They could be likened to a scythe in a wheat field. They would basically hit the enemy with arrows. When attacked in melee, they would retreat while still shooting backwards. They could easily outrun heavy cavalry because they were lightly armed and their horses were bred for speed as opposed to strength. Akinji forces carried swords, lances, shields and battle axes as well, so that in a field of combat, they could face the enemy first and fight melee. In some Ottoman campaigns, such as the Battle of Krbava field, Akinji forces were the only units utilized without any need for Ottoman heavy cavalry or infantry.
Because of their mobility akinji were also used for reconnaissance and as a vanguard force to terrorize the local population before the advance of the main Ottoman forces. Since they were irregular militia, they were not bound by peace treaties, so they could raid border villages and attack enemy garrisons, fortresses and border posts during peacetime, constantly harassing the enemy and checking the weak spots on the rival country's defences. They would also attack trading routes to cut enemy's supply and transportation.
Akinji forces were led by certain families. Well-known akinji families were Malkoçoğlu, Turhanlı, Ömerli, Evrenosoğlu, and Mihalli. These akinji clans were mainly composed of Turkmen tribal warriors with a leading dynasty which descended from the warrior ghazis of the first Ottoman ruler Osman I. Adventurers, soldiers of fortune, mercenaries, warrior dervishes, and civilians looking for fortune and adventure would also join the ranks of akinji gangs.
Since akinjis were seen as irregular militia, they did not have regular salaries as kapikulu soldiers, or fiefs like timarli soldiers; their only income was the booty that they captured.
The Akinji system had an important role at the establishment of the empire and fast expansion of Ottoman territories in Europe. Though the akinji system worked excellently from the 14th to 16th centuries, it began to decline after the 16th century. Starting with 16th-17th century nomadic Tatar and Nogay cavalry from the Crimean Khanate also served as akinjis for the Ottoman Empire. After the Ottoman advance in Europe stopped, akinji warriors became unnecessary and without the economy of booty this warrior class slowly faded away. After the modernization of the Ottoman army, the last few officially recognized akinji clans were abolished. Still, last remnants of akinji system existed till late 19th century in the Balkan provinces as the bashi-bozouk (irregular) warriors.
Although the terminology differentiating between similar types of Ottoman cavalry corps is not fully clarified, the akinji, once decimated in the battle of Giurgiu in October 1595 as they were retreating over the Danube, was apparently gradually replaced by new irregular corps, such as the "deli" and "bashi-bozouk".
In literature.
Akinji lifestyle with battles was a romantic fantasy for the public and so akinjis were a popular subject in Ottoman folk literature and music. "Serhad türküleri" or "border folk songs" is a subcategory of Ottoman folk music dealing mostly with akinji raids and battles or love affairs of akinji warriors, sometimes odes to fallen warriors. Alişimin Kaşları Kara" (My Aliş had Black Eyebrows), "Estergon Kalesi" (Castle of Esztergom) are some of the most popular examples. In the modern period, romantic-revivalist Turkish writers also wrote poems about akinjis. Yahya Kemal's "Akıncılar" is one of the most well-known example on this subject.