>>197690
>Is an invasion really feasible
They used to fight all the time back in the sword and archery days. Effectively occupying and subjugating people in such a place for the long term is another story entirely though. Afghanistan for example has been invaded countless times, but the invaders usually don't bother trying to directly rule anyone in the mountainous parts because it's always a waste of time and resources since there's countless places to hide and carry out an eternal rebellion.