Kol Aghassi

Kolağası was a military rank of the Ottoman Army. It corresponds to a Senior Captain or an Adjutant Major. Kol Ağası is a compound word composed of Kol and Ağa.
The rank was junior to the rank Binbaşı, and senior to the rank Yüzbaşı in the Ottoman Army.
Despite being a single rank, Kolağası was divided in two: Sağ Kolağası and Sol Kolağası. Sağ Kolağası was senior to Sol Kolağası. After the rank of Yüzbaşı, an officer had to first become Sol Kolağası, before becoming Sağ Kolağası.