This isn't really a campaign. It's just two different missions, totally unrelated except that they're set in the same country and the same war - and only one identifiably so; the other, if they didn't tell you, you'd guess you were in some sort of alternative-reality story. A very badly written one.
In fact it's hard to believe they're even part of the same game. One is of absolutely outstanding quality in all respects - graphics, effects, historic and geographic authenticity, you name it - while the other is, how shall one put it delicately, a piece of shit.
Anyway the point is that this is not a "campaign" in the sense of the other campaigns in the game; it's just two missions unconvincingly stuck together - and indeed the designers seem to have recognized this, because in this, as in no other campaign in HD2, you get to start all over in the second mission with a complete new outfit of men and equipment.
And so I will save my usual remarks, such as equipment suggestions and the dreaded Reality Check, for each of the two individual missions.