Most successful at what?
Very isolationalist?
1848 - Invasion of Texas and Mexico, annexing both Texas and California.
1893 - Backed Coup in Hawaii, then annexed it.
1899- Invasion and Annexation of the Phillipines
Between 1903 and 1925 the US “intervened” so much in Central America on Behalf of its banana companies, that we just call this period “The Banana Wars”. Several enacted regime changes for the sole purpose of maintaining their grip on Central American Bananas.
1912 - Invasion of Nicaragua, followed by 21 years of occupation.
1915 - Oh there’s Haiti. Invaded in 1915, then occupied for 19 years. During that time, the US redirected 40% of Haiti’s State Budget towards debt repayment, stifling any development.
1916 - The very next year, the US invaded the Dominican Republic, occupying it for 8 ,ears and selling of large amounts of sugar plantations to itself.
Isolationism looks different in my opinion.
And after the second world war, this continued, as you said, in the cold war. From which America massively profitted.
1949 - Syria elected a President who nationlizes oil, he gets overthrown by a military junta who immediately allows America to extract Syrian oil reserves and to build a pipeline.
1952 - Iran elects a left prime minister who nationalized oil, he gets overthrown and Iram regresses from a constitutional monarchy to authoritarian monarchy, which immediately allows America and Britain to extract American oil.
1954 - Guatemala elects a left president who does a land reform, he gets overthrown by military junta who redistributes the land to the United Fruit Company. The first attempt to do that failed in 1952.
1959 - Nam. You know about it.
1964 - Brazil has a left president who gets couped by american backed forces, leading to 21 years under a militqry dictatorship. That supports American efforts to coup neighboring countries.
1965 - US backs a coup in the congo, leading to 26 of brutal dictatorship.
1965 - The indonesian military starts a genocide, encouraged by the US-Ambassador, who says to “crack down hard on political opponents”. Half a million people die, the US had knowledge of this the entire time and actively supported the military.
1973 - Chile elects a left president, who nationalises its natural resources. America completely shuts down the chilean economy with the express goal of an overthrow and then supports the Pinochet Coup. Leading directly to mass murder.