Vasile Lupu, the ruler of the principality, maintained friendly relations with Bohdan Khmelnytsky from October 1648, but he also sent information about the state of the Zaporozhian Army to Warsaw and lent the royal government money to hire soldiers.

[2] Having crossed the Dniester with the Tatars, the hetman occupied Iași in September 1650, and then demanded an alliance in an ultimatum, which was to be secured by the marriage of the voivode's daughter Ruxandra to Khmelnytsky's son Tymofiy.

After the failure of the siege, Tymofiy crossed the border into Moldavia and set off with the regiment to the Moldavian capital of Iași,[4] forcing Vasile Lupu to go through with the 1650 arrangement.

The Moldavian voivode was impressed with the regiment's performance and attempted to enlist the support of Colonel Osip Glukh in difficult circumstances for himself.

In the spring of 1653, another dynastic rebellion broke out in Moldova, in which the pretender to the throne, Gheorghe Ștefan, was supported by Transylvania and Wallachia.