The communist regime of Yugoslavia cost the Croatian people from 1941 to 1951 some 450.000 murdered civilians and prisoners of war, including 40.000 wounded and over 50.000 killed in battle. So far over 900 mass graves have reportedly been discovered in Croatia.
From a document of the OZNA (a notorious communist secret police): "Kill priests, peasants, merchants, the rich, their families and their closest associates..." source
March 10, 1972, Josip Senić - killed by Udba because of the struggle for the Croatian state (source)
17.02.1975 UDBA executed Nikica Martinović. He was killed in his own shop in Austria. Killed by Milan Dorić Hamzi (source)
09.10.1981 Ante Kostić, executed in Germany by the UDBA