When it came time to do a sequel to First Blood, there was a thought that Rambo needed a partner.

Producers wanted John Travolta, but Stallone vetoed the idea. Lee Marvin (who almost played Colonel Trautman in the first film) was offered the role of Marshall Murdock, but declined.

In fact, that sidekick character is in the first draft James Cameron wrote for this film. Stallone said of what he wrote, "In his original draft it took nearly 30-40 pages to have any action initiated and Rambo was partnered with a tech-y sidekick."

What ended up on screen was very different.

"Rambo, John J., born 7/6/47 Bowie, Arizona of Indian-German descent. Joined army 8/6/64. Accepted, Special Forces specialization, light weapons, cross-trained as medic. Helicopter and language qualified, 59 confirmed kills, two Silver Stars, four Bronze, four Purple Hearts, Distinguished Service Cross, Medal of Honor."

Yep - that's our hero. Given that he kills 74 people in just two days in this film, he's somehow more successful in Vietnam the second time. But we'll get to that.

For now, it's been three years and Rambo is paying for his actions in the original movie when he's visited by Colonel Sam Trautman. Even though the Vietnam War is over, people remain convinced that POWs have been left behind. The government has authorized a solo mission to confirm if any are alive and Rambo is one of only three men suited for such a mission (who the other two are, I leave up to you, dear viewer, but if one of them isn't Thunder, I don't want to know about it).

Marshall Murdock (Charles Napier) is the suit in charge that tells Rambo that all he has to do is take hotos, not rescue anyone or engage the enemy. As Rambo drops into enemy territory, his parachute becomes tangled, leaving him with only a knife and a bow. He doesn't need all those guns, trust me.

A young intelligence agent named Co-Bao (Julia Nickson) and some pirates take Rambo up river, where he saves an American POW who has been crucified and left to die. The Vietnamese troops attack and the pirates betray Rambo, so he kills everyone. Rambo's extraction is cancelled, as Murdock says that Rambo has violated his orders and tells Trautman that he never intended for there to be any rescue - it would be too expensive and no one wants another war.

Rambo is turned over to teh Soviet troops who are training the Vietnamese, Lieutenant Colonel Podovsky and Sergeant Yushin. They demand that he read the US government a message to stay away from future missions. Instead, he warns Murdock that he's coming for him. He escapes thanks to Co and they kiss, only for her to die seconds later.

Rambo then becomes a slasher villain that we cheer for as he wipes out every single enemy one by one. He even steals a helicopter and uses it to destroy Murdock's office before demanding that the rest of the POWs get recued.

Trautman then confronts Rambo and tries to convince him to return home, but our protagonist angrily replies that he only wants his country to love its soldiers as much as its soldiers love it.

James Cameron claims that he only wrote the first draft of the script and that Sylvester Stallone made many changes to it. He claims that the star didn't like that the sidekick got all the cool dialogue and scrapped most of the POWs backstories.

When the film was released, the political content of the movie was controversial, with many critics not ready to see any heroism in the Vietnam War. For his part, Cameron commented that he wrote the action and Stallone the politics.

That said - at the time of the making of this film, there were 2,500 soldiers missing in action, so you can see where the sentiments were coming from. There were even reports that Delta Force operatives were in training to try and find those prisoners.

Stallone explained the ending of the film quite passionately: "I think that James Cameron is a brilliant talent, but I thought the politics were important, such as a right-wing stance coming from Trautman and his nemesis, Murdock, contrasted by Rambo's obvious neutrality, which I believe is explained in Rambo's final speech. I realize his speech at the end may have caused millions of viewers to burst veins in their eyeballs by rolling them excessively, but the sentiment stated was conveyed to me by many veterans."

This film was beloved by audiences worldwide just as much as it was savaged by critics. It won Worst Picture, Worst Actor, Worst Screenplay and Worst Song ("Peace In Our Time" by Frank Stallone) in the Razzie Awards. It doesn't matter - it started an entire genre of military revenge pictures.

Director George P. Cosmatos would go on to work with Stallone again on Cobra, as well as direct the films Leviathan and Tombstone. He was recommended for the film by Stallone's son Sage, who liked his movie Of Unknown Origin.

This movie marks a true change from the way American audiences would view Vietnam and its veterans. It could have only been made in 1985, to be honest, and exists within that time to remind us of a completely different era.

When I was a kid and I watched the first Rambo and this one, I thought the order was wrong. Here Rambo goes to war in the first one he came back from one. Well I was clueless what can I say. It's also not like I saw any social commentary or understood what PTSD is. I know I probably was too young to have watched them, but that I also did not know at the time.

Having rewatched the first three again recently, I remembered them and my memory got freshened up on a lot of things too. The action is pretty stellar in this one and we get some recognizable characters back and some new ones added. Now the main twist is very predictable, but the movie still works despite that. I remember the horror I felt when the slugs scene came up. But I learned about the salt "trick" too - not that I got a chance to use it (thankfully).

The first film in the Rambo series, FIRST BLOOD, was a taut and realistic thriller that used the plight of Vietnam veterans as a basis for a survival adventure film. The sequel, RAMBO: FIRST BLOOD PART II, is an all-out-action, over-the-top jungle adventure film that uses the plight of Vietnam veterans and POWs as a basis for an OTT thrill ride. Made in the same year as the similarly outrageous COMMANDO, this is very much a 'guy' film – it's over-the-top, frequently unbelievable, and packed with all manner of violence and mayhem to get crowds whooping. It may not be very politically correct, and yes, it may glorify violence – but it makes for one heck of a watch!

Stallone has long been a favourite of mine and he once again shows why he's such a top star. Physically, he's a man mountain who you believe can easily wipe out a Vietcong jungle outpost single-handedly. Emotionally, he runs deep, using his eyes to transmit his feelings in a low key turn. I've loved jungle films for as long as I can remember and this film makes great use of them as we watch Rambo tracking and eliminating his enemies one at a time.

Much of the action is saved for the unbelievable final half hour, in which the carnage reaches outlandish levels as Rambo uses rocket launchers, exploding arrows, a helicopter, and his trusty machine gun to tackle the enemy. A supporting cast of dependables putting in decent turns – Crenna, Napier, Berkoff – adds to the fun. My only complaint is with the music, which is frequently underused. A loud, stirring soundtrack of the kind featured in RAMBO (2008) would have enhanced this film no end, but they frequently miss the cues. Nevertheless RAMBO: FIRST BLOOD PART II is a film you can really get your teeth into: light, airy, full of explosions and death. They don't make 'em like this any more, God bless 'em.