reporter: that s happening very quickly. the taliban are advancing very quickly and that s the way this happens, is once you have a crack and once things start to fall apart, they fall apart very quickly, and what is happening now is the taliban are taking over not commando posts, the reason we were out with the commando is that is the one unit that is really still engaged in the fight. it s the big army, the afghan national army and some of the smaller police divisions that are crumbling and in many cases they are not putting up any kind of resistance. they are surrendering their bennons and their posts to the taliban. the taliban captured those weapons and captured the imagery of the sur renter and that intimidates other afghan posts. so the next ones fall. they capture more weapons and it snowballs and that s what we re seeing. right now the taliban have about a third of the afghan military posts. so it has come down to this one