Which was for you the most ASBish war victory IOTL?
I mean, usually wars are won by the side who has more men, more resources, a better warfare tecnology, a better military, and so on.
Sometimes the side who is weaker manages to win a battle or two due to better tactics, better use of the terrain, surprise attacks and all that. But, more often than not, this side eventually loses the war.
But sometimes it doesn't. The Mapuche Indians, for example, were able not only to defeat the Spanish in several battles, but to remain unqonquered throught ALL the colonial era (they were beaten in 1880). Not only this: they were able to expand significantly their territory (in 1500 they occupied Southern chile and Western Neuquen. In 1800 they also occupied most of the Pampas and Patagonia).*
What are other similar cases you can think of? Whish was the most ASBish victory of OTL?
*EDIT: And they did so despite the fact their territory was (originally) relatively small, and that it was surrounded by the Spanish in the North and in the South (in Chiloé), and by the Pacific Ocean in the West. In the West they had the Andes, but, luckily for them, the Spanish didn't conquered the land East of that range (at that latitute); thus, the Mapuche were able to expamd eastwards towars the Argentine panpas and Patagonia.