The media got mad when Trump wouldn't attack Syria, and said using missiles made him seem Presidential. Makes you wonder what the media and the rest really want.
Generally, the US/NATO-led interventions in the Balkans, most notably the US-led NATO-Serbia war, after explicit Congressional disapproval.
Though I suppose those could be excluded since they were interventions in existing conflicts.
Of course, there's probably some dispute over whether intervening to prevent genocide, either in general or in the specific manner it actually occurred under Clinton in the Balkans, is really a negative.
Of course, compared to Iraq invasion it was a small scale operation, but is still generally considered Obama responsibility (although of course primarily Sarkozy and Cameron responsibility).
If you were 4 years old today, Trump still would only be the second President in your lifetime not to start another war.
The 34 prior years may or may not change that depending on whether you look at starting armed conflict or starting US involvement in the conflict.