General of the Infantry was a general of the branch rank in the Imperial Russian Army. It served as the rank below General-feldmarshal, and was the highest rank one could achieve in the infantry from
Thadeus Ferdinand Ludwig von Sivers, always falsely referred to as Thadeus von Sievers, was a Baltic German general who served in the Imperial Russian Army.
General of the Infantry Thadeus von Sivers, c. 1914.