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Top Books on Reddit in 2018 rank no. 124
A death squad mercenary stops for lunch in El Salvador, 1980s. [700 × 1047](r/HistoryPorn)
Because left wing dissidents wanted to break away from US patronage and nationalize US property in their country and forge their own destiny. This would basically infringe on US corporations rights to exploit poor South American countries for their own profit. US didn’t like that much and engaged in a systematic terror campaign aimed at attacking any grassroots resistance to US backed dictators. The result was essentially a war on peasant populations not just inEl Salvador, but in several other Latin American nations.
Important to note that this is par for the course of US intervention in the third world. I encourage every American to read up on it.
Edit: a word Edit2: A good book on US foreign intervention