One significant consequence of the tension arising between Yugoslavia and Soviet Union, was that Tito fought Yugoslav Stalinists with Stalin's methods. In other words, Aleksandar Ranković and the State Security Service (UBDA) employed the same inhumane methods against their opponents as Stalin did in the Soviet Union against his. Not every person accused of a political crime was convicted and nobody was sentenced to death for his or her pro-Soviet feelings. However this repression, which lasted until 1956, was marked by significant violations of human rights.