 Complete the following phrase:  In February 1651, Hetman Kalinowski advanced against the Cossacks, but suffered heavy losses and withdrew to Kamieniec Podolski; in May he fought his way to Sokal, where he joined the gathering of the Crown army. In June, both the regular army and szlachtas pospolite ruszenie moved decisively against the Tatar-Cossack forces. At the 