Beginning in the 1970s another wave of Peruvians arrived in the United States, most of whom were fleeing Peru's militaristic government under the dictatorships of Juan Velasco Alvarado and Francisco Morales Bermúdez both marked by coups and socio-economic instability. The 1980s and 1990s saw the most significant influx of Peruvians to U.S. shores, this time in response to the hyperinflation crisis that plagued the Peruvian economy, internal unrest in Peru by terrorist groups, and an authoritarian government headed by Peruvian President Alberto Fujimori.