XPost: soc.history, soc.culture.russian
From: hayesstw@telkomsa.net

During the 1680s, the Tsardom of Russia acquired a substantial
expansion in Transbaikal after signing the Treaty of Nerchinsk with
China (Qing dynasty). By this time (at the end of the 17th century),
an extensive territory from Yenisei to the Sea of Okhotsk was secured
through colonization. The discovery of the Bering Strait in 1728
confirmed the eastern borders of modern Russia. The eastward advance
through Siberia extended the Tobol Razryad transforming it into
overstretched territory that was initially in 1708 included into
Siberia Governorate.

Source: <https://wikimili.com/en/History_of_the_administrative_division_of_Russia>

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