... in the middle of the cold war .
And if you're looking for more recent cases, the USA supported the military coup in Egypt in 2013. The government even refused to call it a coup because of legal implications. This was an important blow to democracy in the region. The authoritarian evolution in Turkey is partly due to this.
I'm not saying other democracies are better than the USA. I'm French, and my country still cannot face its past in Algeria. And France still supports dictators, like a 2018 bombing in Chad recently proved. But over the last couple of decades, I don't think any country killed more foreign civilians than the USA did, by a large margin. Even Saudi Arabia and UAE, with their wars in Yemen and Lybia, can't compare.