The Carnation Revolution, also referred to as the 25th of April , was initially a military coup in Lisbon, Portugal, on 25 April 1974 which overthrew the dictatorial regime The name “Carnation Revolution” comes from the fact that almost no shots were fired and that when the population took to the streets to celebrate the end of the dictatorship and war in the colonies, carnations were put into the muzzles of rifles.