Tsushima would be one, it set Japan up as a significant power and on the path of imperialism.
I’m torn between Cannae and Zama.
Cannae was a complete victory for an army that was out numbered and didn’t enjoy intel advantage like Midway.
Zama on the other hand was the start of Roman dominance for a long ass time.
Dien Bien Phu – ended French colonialism in SEA.
Teutoburg Forest – the worst defeat in Roman history.
Tired is enough.
I like tiny miniatures