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Przhevalsky was born in Kimborovo, in the Smolensky Uyezd of the Smolensk Governorate of the Russian Empire. He studied there and at the military academy in St. Petersburg. In 1864, he became a geography teacher at the military school in Warsaw.
In 1867, Przhevalsky successfully petitioned the Russian Geographical Society to be dispatched to Irkutsk, in central Siberia. His intention was to explore the basin of the Ussuri River, a major tributary of the Amur on the Russian–Chinese frontier. This was his first important expedition. It lasted two years, after which Przhevalsky published a diary of the expedition under the title, Travels in the Ussuri Region, 1867–69.
His most well-known follower and student was Pyotr Kozlov, who discovered the ruins of the Tangut city Khara-Khoto in the Ejin Banner of Alxa League in western Inner Mongolia near Juyan Lake Basin.

