Initially, the Soviet occupation gained support among some citizens of the Second Polish Republic. Some members of the Ukrainian population welcomed the unification with Soviet Ukraine. The Ukrainians had failed to achieve independence in 1919 when their attempt at self-determination was crushed during the Polish–Soviet and Polish-Ukrainian Wars. Also, there were pre-war Polish citizens who saw the Soviet NKVD presence as an opportunity to start political and social agitation. Many of them committed treason against the Polish state by assisting in round-ups and executions of Polish officials. Their enthusiasm however faded with time as it became clear that the Soviet repressions were aimed at all peoples equally.