Nikolai Nikolayevich Obruchev (1830–1904) was a General Staff Officer in the Imperial Russian Army, imperial Russian general staff officer, military statistician, planner and chief of the Main Staff.
Author: Album of portraits of former cadets of the 1st Petersburg Cadet Corps. Phototype K. Stein and S. Laptev / ?????? ????????? ?????? ????? 1-?? ?????????????? ?????????? ???????. ????????? ?. ?????? ? ?. ???????. Source: here / ????? License: CC-PD-Mark PD Old