'riding/cavalry master')[1] is usually a commissioned officer military rank used in a few armies, usually equivalent to Captain.
A rittmeister is typically in charge of a squadron (a company-sized unit called a "troop" in the United States, as opposed to the U.S. cavalry squadron of larger battalion size), and is the equivalent of a Hauptmann rank (or captain in most army branches).
[2][3] The armies of many Central and Eastern European countries adopted a localised term for the similar rank.
[citation needed] In earlier times, the rotmistrz served as the commander of an infantry or cavalry company, though sometimes he would temporarily be assigned field rank tasks e.g. commanding an entire regiment or even a larger formation.
The rank was also adopted by Russian New Regiments as rotmistr (ротмистр) and later formalized in Table of Ranks as the cavalry post; until 1798, and between 1883 and 1918, a lower-ranking shtabs-rotmistr (штабс-ротмистр) also existed, representing the ranks of Senior Captain and Junior Captain in the Russian Imperial Guards Cavalry, Army Cavalry, Gendarmerie and Border Guards by 1914.