Cossack raids
The Cossack raids were a series of military offensives conducted by the Cossacks (the Zaporozhian Cossacks of southern Ukraine and the Don Cossacks of southern Russia) between 1441 and 1774. Primarily occurring in the Crimean Khanate, the Nogai Horde, and the Ottoman Empire, the raids developed as a reaction to the Crimean–Nogai slave raids in Eastern Europe.