1783 Russian annexation of Crimea

The Russian Empire formally annexed the Crimean Khanate on 19 April [O.S. 8 April] 1783, following a decade-long campaign of intervention in the Crimean Peninsula. Russia aimed to control the Black Sea and end raids by Crimean slavers into its territory.

Source: Wikipedia — 1783 Russian annexation of Crimea (CC BY-SA 4.0)