How is it terrorism when they kill soldiers?

[HoreTore]

But srsly, I would agree that teh Taliban do want to bring stability to the country, very admirable of them. But its the kind of stability they want to bring and the way in which they are doing it which I belive gives people justification in calling them terrorists, though tbh alot of the fighters are actually poor locals who have had enough of U.S backed warlords, so its a rather hit and miss kind of thing.

I'm not arguing whether to call them terrorists or not. I'm arguing whether it's correct to call an attack on enemy soldiers a terrorist attack.