The Infamous Decade (in Spanish, Década Infame) in Argentina is the name given to the period of time that began in 1930 with the coup d'état against President Hipólito Yrigoyen by José Félix Uriburu and resulted in the rising to power of Juan Perón after the Military coup of 1943. This decade was marked by significant rural exodus, many small rural landowners being ruined by the Great Depression, which in turn pushed the country towards import substitution industrialization. The poor economic results of the policy and popular discontent led to another coup in 1943, the "Revolution of '43", by the Grupo de Oficiales Unidos (GOU), the nationalist faction of the Armed Forces, against acting president Ramón Castillo, putting an end to the Infamous Decade.
This period was characterised by electoral fraud, persecution of the political opposition (mainly against the UCR) and generalised government corruption, against the background of the Great Depression. The impact of the economic crisis forced many farmers and other countryside workers to relocate to the outskirts of the larger cities, resulting in the creation of the first villas miseria (shanty towns). Thus, the population of Buenos Aires jumped from 1.5 million inhabitants in 1914 to 3.5 million in 1935. Lacking in political experience, in contrast with the European immigrants who brought with them socialist and anarchist ideas, these new city-dwellers would provide the social base, in the next decade, for Peronism.