Sardinian nationalism and local protest movements became stronger in the 1970s, and a number of bandits ("anonima sarda") started a long series of kidnappings, which ended only in the 1990s. This also gave rise to various militant groups that blended separatist and communist ideas, the most famous being "Barbagia Rossa" and the Sardinian Armed Movement, which perpetrated several bombings and terrorist actions between the 1970s and the 1980s. In the span of just two years (1987–1988), 224 bombing attacks were reported.