“Dirty war” was the term given by the French to their fighting in Algeria (from what I understand) but I thought it’d make a great title for a game (or supplement or thing) focused on all those “Brush wars” in the cold war period you mention.
The idea would be a campaign game where you have to manage your troops, undermine enemy determination through striking at targets and so forth.
However, I haven’t nailed down exactly how to make it work yet.
It was originally intended to be a thing for No End in Sight.
Nordic Weasel Games