Why defeat the Taliban? It was funded by America to deal with the Soviets during the Cold War.
Gurkhas are like ferocious pitbulls, a force to be reckoned with. But at the end of the day, they're still only dogs, beholden to their master's instructions.
P.S: That much firepower and only 30 Taliban folks were taken down? That's not very efficient is it? So, what's the point of bragging about it?