Low level, true - Look up the Fruit Wars; where we had expeditionary "trainers" and supplied arms to Central and South American plantation owners cum Dictators. "Trainers" and Arms to prevent "the Rise of Communism"...
Recently as far as Reagan, with Granada, Iran-Contra and other regime toppling actions that were done without Congressional approval.
As for bombing countries, generally, we had backing of our allies in one form or another, even Obama's bombing of Libya, though I still wonder who was really behind getting rid of Gaddafi, as he was seriously going after the IS cult groups in his region and was no clear and present danger to us at the time.
At the time, I suspected the Russians and/or Saudis saw a united Libya as an economic or political (Gaddafi had some serious dirt on the old Soviet regime, and probably on the Saudis, too) threat more than Libya posed as a Terrorist Export threat.
I suspect the same here; except I'm pretty sure this is more of a Shia/Wahabist conflict for control over the waters around the Arabian Peninsula, and a lot of green lights were given to *rump, just as they were to Obama and Bush the Younger, to play with military toys in the region.
The House of Saud hates the Shia, the Arabs and especially the Shia Persians with all that contiguous history behind them.
If the Saudis had nukes, they would have used them on both Baghdad and Tehran 25 -30 years ago.
*Rump's actions only bring us into the conflict as a distracting weapon directed by the Saudis and their ally of the moment, Netenyahu to further neuter Iran.
Russia doesn't really care what happens to Iran, in fact, the weaker Iran is, the more concessions Russia can get as it loses more resources and world standing over the losses in Ukraine.
= new reply since forum marked as read