Complex sentence: Both factions supported the Sovietization of Poland with slightly different aim, but the staunch Stalinists lacked the support of Khrushchev who flew in with a high-level delegation, and the regime turned to conciliation: it announced wage rises and other reforms.
Split into simpler sentences: Both factions supported the Sovietization of Poland with somewhat different aims, but the staunch Stalinists lacked the support of Khrushchev, who flew in with a high-level delegation. The regime turned to conciliation: it announced wage rises and other reforms.