The Dzungar Khanate collapsed today 170 years ago due to Russian intervention in the succession crisis, turning Dzungaria, Moghulistan etc into small protectorates against British influence. But not known much is that the Qing attempted this in the 18th centudy but only recovered Tibet and Qingai, and not further West.
So... the main question is... What if the Qing destroyed the Dzungar Khanate?
Ooc: not sure if this is possible but this era of history is underappreciated so I'll try something.