The USA helping any latin american dictator in history to gain economical and military power in the zone, along with their very well known participation or at least knowledge in the tortures and disappearances of dissidents that took place on those countries during these regimes.
We are talking about at least 10 countries who got on this problem and got out with amounts of very doubtful acquired economical debts to USA.
And we are talking not too long ago, 1986 was the return to democracy for Argentina, I think some other countries took some time more.