Pyotr Kuzmich Kozlov (Russian: Пётр Кузьми́ч Козло́в; 3 October 1863 in Dukhovshchina – 26 September 1935 in Peterhof) was a Russian and Soviet traveller and explorer who continued the studies of Nikolai Przhevalsky in Mongolia and Tibet.
HistoryLayer draws the world as it was in any year from 123,000 BCE to
2026. Move the slider and the borders redraw for that year; the map
carries 23,890 events, 12,790 people, 837 wars and 13,183 cities, each
one readable in place. Signing in is optional and lets you keep what
you find.