After the death of the famous Hetman Bohdan Khmelnytskyi (1657), Ukraine experienced a period of instability and unrest, which historians call the Ruin. The Muscovy sought to take advantage of this situation by actively interfering in the internal affairs of the Hetmanate, not complying with the Pereyaslav Articles of 1654. https://univd.edu.ua/uk/news/20300