https://en.wikipedia.org/wiki/List_o..._United_States
Just some random thoughts on failed US foreign policy and support for dictatorships:
During the cold war, the US has supported dictatorships to slow the rise of communism: Vietnam, China, Korea
Chiang Kai Shek could have won the war in China and modern day China would be a democratic one.
"From the 1980s onwards, the United States government began to fear that its interests would be threatened by the increasingly popular Islamist movements in the Middle East, and began to work to secure cooperative authoritarian regimes in the region, while isolating and weakening, but not always removing, uncooperative ones"
The US war in Iraq and war in Syria to dethrone authoritarian regimes have now destabilized the region leading to the rise of terrorist organizations such as ISIS.