I was wondering going in how "Rambo III" would differ from "Rambo II" besides the location. I didn't expect it to be anything like "First Blood," but why would I like this one if I did?
"Rambo III" was based in Afghanistan, which was really relevant in 1988. The Afghans fought the invading Russians from about 1979 to 1989. The U.S. had a rooting interest in that conflict because Russia was our biggest threat on the world stage. "Rambo III" did a fine job in limiting any U.S. rhetoric and focused on the people of Afghanistan and their plight, because after all, they were the ones being slaughtered and displaced, not Americans.
"Rambo III" made an action movie into a human interest movie in a smooth fluid manner. Yes, Rambo wanted to save his Colonel, but it's clear the movie didn't want to overlook the Afghan people and make it all about Rambo and Colonel Murdock (Charles Napier).
Early in the movie Rambo said that his favorite sport was football. Later in the movie we got a football moment when Rambo, in a tank, went head up with the Russian commander who was in a gunship helicopter. They lined up and barreled toward each other like a running back and a linebacker on the goal line. I won't play spoiler, but I will say that that scene was a synopsis of the movie and the entire Cold War. Two powerhouses were lined up going head to head. We now know the winner of that goal line stance, but in 1988 the eventual winner was very uncertain.