@matigo do you mean 'successful' in the Regime Change, or in the regime lasted & was decent?
If the former: Samoa in 1887, Hawaii in 1893, Puerto Rico & Cuba soon after, then the Phillipines, Panama, Nicaragua, Honduras, Haiti and the Dominican Republic. Things went quiet until the 40s, but Korea, Syria(!) Iran & Lebanon, with a CIA coup in Guatemala between them. Then the three biggies: Dom Republic, Brazil & Chile. Then the ones everyone knows about: Afghan war, Contras, Grenada & Panama.
Which of those new regimes were humanitarian? Um… Hawaii, if you were white & wealthy?
// @larand