Yesaul


Yesaul, or osaul, осавул, a post and a rank in the Ukrainian and Russian Cossack units.
The first records of the rank imply that it was introduced by Stefan Batory, King of Poland in 1576.

Cossacks in Russia

There were different yesaul posts and ranks in Cossack Hosts in Imperial Russia:
In Ukraine of 17th and 18th centuries osaul was a military and administrative official performing the duties of aide-de-camp. The head of state, hetman, would appoint up to two osauls known as a General Osaul. There also was a Regimental Osaul as well as Company Osaul, with each regular cossack regiment and company except artillery having two of each. Beside them there were osauls under special assignments one of them serving for General Obozny who performed duties of a chief executive and was the second in importance after Hetman.

General Osaul

A senior officer of a Hetmanate cossack army who was a member of the general officer staff.
;Duties
Other duties consisted of being a hetman's envoy, supervised matters of internal security, conducted annual regimental musters and inspections. Among the notorious osauls were Petro Doroshenko, Demian Mnohohrishny, Ivan Mazepa, and Ivan Skoropadsky.
In 1798–1800 after the liquidation of Zaporizhian Host, the rank of osaul was equated with the ranks of rittmeister in cavalry and captain in infantry.

Regimental Osavul

Regimental Osavul is an assistant Colonel in Military Affairs.

Sotenny Osavul

Sotenny Osavul is an assistant sotnik in Military Affairs.