Do I use the definite article, or not, with a plural count noun when referring to all of those things named by the noun?

(the) Security forces helped us fight (the) terrorists.

If I wanted to refer all security forces in a specific country would I need to use a definite article? Same with "the terrorists", I want to make clear that the security forces are fighting not all terrorists but a few groups of terrorists; would I have to use the definite article then?

The question this is supposed to be a duplicate of talks about generic noun phrases. This means things that do not actually exist in the world (you can't feed or take a photo of a generic lion, for instance). I am talking about noun phrases (security forces, terrorists) that actually exist and fight and die in a specific country. We can feed and and photograph them. They are "real," not generic.