Kuban River
In order to stop Turkish ambitions to use Kuban region to facilitate the return of the Crimea, Russia started to establish a network of fortifications along the Kuban River in the 1770s. After the Russian annexation of the Crimea, right-bank Kuban, and Taman in 1783, the Kuban River became the border of the Russian Empire. New fortresses were built on the Kuban in the 1780s–1790s.