Argentina's military involvement in Central America began during the Nicaraguan Revolution between 1977 and 1979, when Argentina began supporting the Somoza family regime in Nicaragua in its fight against the Sandinista Front. Argentina supported the Somoza dictatorship until its overthrow by the Sandinistas in July 1979. In November 1979, before the 13th Conference of American Armies in Bogotá, Colombia, junta leader General Roberto Eduardo Viola offered a proposition calling for a joint Latin American effort against, on his words, "leftist subversion", citing this as "the greatest military threat in the region". Pursuant with this plan (referred to as the "Viola Plan"), Argentina expanded its counterinsurgency and military assistance to El Salvador, Guatemala and Honduras at the behest of the military leadership in those countries.