Herat is a very pro-Iranian province and historically Iran has long believed it to be a province of their own. The local warlords are all Iranian funded. Most of the natives of the area are Tajiks, they speak Persian. When the Taliban came to power, and attacked Herat, Iran very nearly invaded Afghanistan. They had apparently massed along the borders back in 2000. They canned the plans after the NATO invasion of 2001.
Our campaign follows on from the current real world conflict in Helmand province. The concept is that should the Taliban retreat, they might choose to retreat north-west into Herat. NATO forces would follow, expanding their position at camp stone south of Herat, and begin engaging Taliban positions. Local Tajik civilians get caught in the crossfire, Iran decides to move in to backup their warlords, and secure the civilian population. One too many stray arty rounds and NATO is in a full blown conflict with Iranian armoured forces.
Cheers
Thanks for the reply and the explanation regarding a deaper insight about the Combat-Helo campaign plot. It really gives a better understanding why Iran could or will invade Afghanistan (or part of it) in Combat-Helo. Also you posted some historical facts that I really didn't knew about. I knew that the Iranians and the Taliban were and are very far from being "close friends" but I didn't knew that they were so hostile against each other (and I also didn't knew about the Herat region and their close relations with Iran.
Great info, thanks for sharing AD!