Azeb
Azebs, azabs, or azaps, also known as Asappes or Asappi, were irregular soldiers, originally made up of unmarried youths. They were conscripted among reayas and served in various roles in the early Ottoman army. The word azeb either often indicates a light infantry soldier which was called yaya azeb or a marine soldier which was called bahriye and deniz azeb. The term was used in the sense of "pirate" or "buccaneer" in Byzantine, Latin, and Italian sources from the 14th to 16th centuries.
History
Azebs were originally an auxiliary infantry unit harkening back to Anatolian beyliks that became independent from the Anatolian Seljuk Sultanate. In the maritime beyliks, they also served as naval units. For instance, in the 13th century, sources address existence of troops called azebs in the Beylik of Aydın.According to Stein, by the 14th century azebs garrisoned in strongholds were called kale azebs. Azebs in fortresses had duties such as building bridges, working as sappers and doing the job of armorers, especially after conscription of devshirme armorers stopped. They usually comprised most of the garrison in smaller forts and palankas.
In the Ottoman Empire the main role of azebs were fighting as infantry archers on front lines before the cannons and janissaries, After azebs slowed down the initial enemy charge, they would withdraw to left and right, and let the Ottoman cannons and janissaries fire at them.