Podpolkovnik

Podpolkovnik (Russian: Подполко́вник; literally "'sub –, junior – , or lower regimentary"') is a military rank in Slavic countries which corresponds to the lieutenant colonel in the English-speaking states and military.

Russia and USSR

Podpolkovnik (Russian: Подполко́вник) — military rank and special rank in the historical Imperial Russian Army, in the USSR and in Russia. First it appeared in Russia as appointment or assignment to the assistant or deputy commander of a regiment sized military formation at the end of the 15th — early 16th century.

In the Streltsy formations, as a general role, the Podpolkovnik was responsible for all administrative tasks and functions. Normally it was of Nobility or Boyar origin.

From the 17th - to early 17th century there was a rank and an appointment under the designation Polupolkovnik (ru: Полуполковник; Halvpolkovnik). Beyond its normal responsibilities, he was in charge to command the second halve of the regiment, the rear -, reserve -, and other regular units (until the introduction of the battalion structure).