The reason the government gave for fighting the Guerra Sucia (Dirty War) was the prevention of a communist/socialist takeover. During the Guerra Sucia in Argentina from 1976 to 1983, the military junta sought to eliminate perceived leftist threats through violent and repressive means. The government justified its actions as necessary to protect the country from what they saw as communist or socialist influences that posed a threat to national security and stability. The primary goal was to suppress dissent and opposition that could challenge the existing political and social order, rather than seeking financial gain or protection from invaders.
In summary, the government framed the Guerra Sucia as a campaign against ideologies they believed could undermine the established power structure, rather than for financial motives or defense against external threats.