TLDR Trump loosed the dogs of war, screwed the pooch, and now gets to eat a dogshit sandwich. He won on day one and lost everything. Iran's regime literally changed — new Supreme Leader, wartime mandate, unified population — and the US is still bombing...
The allies won WW2. The US alone would have lost.
If we make that distinction then we’re looking at Spanish American war as their last win.
Well… I guess they won the American Civil War.
Half of them lost it though, shall we call it a draw?