It was subsequently revealed that this story was false. Perhaps it's just as well. In Rambo III (1988), Rambo fought alongside the Afghan Mujahideen against the Soviet occupation of Afghanistan. Some versions of the film are even dedicated to the Mujahideen.
After the war, factions of this movement later became the Taliban and Al-Qaeda. It's just as well this story is false, because it would be ludicrous for Rambo to be fighting against people who were once his allies. Who wants to watch a movie that reminds you of your government's foreign policy misadventures? This would make the film a commercial flop. It would almost be a more visceral companion piece to Charlie Wilson's War.
http://www.businessinsider.com.au/rambo-last-blood-is-rambo-vs-isis-2015-7
