In Argentina, there were six coups d'état during the 20th century: in 1930, 1943, 1955, 1962, 1966 and 1976. The first four established interim dictatorships, while the last two established dictatorships of permanent type on the model of a bureaucratic-authoritarian state. The latter conducted a Dirty War in the line of State terrorism, in which human rights were systematically violated and there were tens of thousands of forced disappearances.