Not necessarily...Afghanistan is one of the worst countries in the world to do groundbased warfare in. First of all, it's covered in landmines.
Second, they use a kind of underground well system to water their farms, and most Afghan soldiers knows this sewer system like the back of his hand...he can pop up from one well, shoot everyone in sight and disappear through another well before anyone can say 'cookie'...
And of course, there are the caves and mountains...