 The regime stifled the public protest and incarcerated the leaders, but this led to the ratification of a new constitution in 1974, giving more rights to the individual republics.At that time, radical Ustaše cells of Croatian émigrés in Western Europe planned and carried out guerilla acts inside Yugoslavia, but they were largely countered.In 1980, after Tito's death, economic, political, and religious difficulties started to mount and the federal government began to crumble.