The Forever War is a science fiction war novel by American author Joe Haldeman. Considered one of the classics of Military Science Fiction, alongside Robert Heinlein's Starship Troopers, the book is a post-modern, post-Vietnam take on the standard sci-fi war novel and as some critics note, a philosophical Deconstruction of Heinlein's work (though it's worth noting that Heinlein himself praised it). The book won the Nebula Award in 1975 and the Hugo and Locus awards in 1976 for Best Novel.

Haldeman, after graduating with a degree in Astronomy, was drafted into the U.S. Army and served as a combat engineer in Vietnam, where he was wounded. His experiences—the terror of combat, the inhuman randomness of government bureaucracy, the sense of coming back to an unrecognizable world, and the futility of the war—are all reflected in the novel. In a re-publication in the 1990s, Haldeman, in a foreword, stated that writing this book was his primary therapy to cope with the after effects of the Vietnam War.

The story is told from the point of view of William Mandella, a recent college graduate with a physics degree who is drafted into the United Nations Expeditionary Force (UNEF) and sent out to fight the enigmatic Taurans, who have been destroying human ships and colonies. The grueling training and enemy attacks are bad enough, but the worst part is the effect of Time Dilation caused by repeated travel at relativistic speeds, which causes the world around Mandella to age and change into something unrecgonizable. Mandella's only remaining connection to his old life is his fellow soldier Marygay Potter, and the two must fight a hostile species to save a world that has been lost to them.

The direct sequel, Forever Free, came out in 1999.

• Action Survivor: It's debatable, but Madella and Marygay. Despite being nothing less than an elite super-soldiers in powered armor, their repeated survival in the unfathomably brutal combat zones is almost entirely through blind luck.
• Adaptation Expansion: The first part of the graphic novel version of the sequel Forever Free shows what happened to Marygay Potter during the final part of The Forever War, after she and William Mandella were assigned to different teams.
• Alien Invasion: Deconstructed.
• Anyone Can Die.
• Arm Cannon: Well, laser fingers, anyway.
• Badass Army: The soldiers all have an IQ of 150 or over, and physical fitness to match. They have survived (well, some of them have) a grueling training regimen on a Death World, and are equipped with Powered Armour and armed with high-powered lasers and tachyon grenades. Later recruits are genetically modified Super Soldiers with enhanced reflexes and intellect. Unfortunately, despite all this, they still have a casualty rate more in line with a Redshirt Army.
• Bug War: Possibly deconstructed, depending on whether the Taurans can be considered "bugs."
• The Chains of Commanding: Experienced by Mandella's previous commanders and eventually by him. The situation would be tolerable if only there was someone he could relate to, but by then everyone from his era is gone.
• Celibate Hero: Mandella after Marygay's reassignment, though not through choice. The one closet heterosexual female who gets drunk enough to consider doing it with him passes out before things can get going.
• Comic Book Adaptation: The novel was adapted into a three-part graphic novel for the Belgian publisher Dupuis by Joe Haldeman and the Flemish artist Marvano as De Eeuwige Oorlog (La guerre éternelle). This adaptation has been published in English as well. The sequel Forever Free was adapted and published by Dargaud as Libre à jamais..
• Compound Interest Time Travel Gambit: Subverted, and hard. The soldiers get quadruple pay for being away in a combat zone for the equivalent of twenty years. By the time the soldiers get back from their first tour of duty, their money is worthless due to hyperinflation and chronic shortages caused by the war and a world-wide famine while they were away. And the size of their compounded pay puts them in a 92% tax bracket.
• Conscription: Often conscription ends up collecting those too poor or untalented to avoid it. Here, the "Elite Conscription Act" drafts only those people who are physically fit and have an IQ of 150 or better. Instead of a poor and ill-disciplined military protecting a rich and talented society, you have a rich and talented military protecting an increasingly poor and ill-disciplined society.

Potter's father comments that the war is the reason why everything is so bad when they return after their first tour; "the very best fell to the Elite Conscription Act and wound up being cannon fodder." Even Mandella comments that wars in the past often accelerated technological and social progress, but this one was doing the exact opposite.

• Crapsack World: It starts as a Dystopia, and it gets crapsackier with every relativistic year.
• Death World. Charon. Outdoor temperature is just above absolute zero. If your Powered Armor cracks, you'll freeze to death before you have a chance to die from loss of oxygen. Ditto if your suit's heating unit is damaged. If you accidentally touch your heat radiator against a frozen gas "rock", it will vapourize with the force of a grenade going off by your neck. Even if the thing you whack your heat radiator against isn't frozen gas, a damaged radiator can broil you to death inside of a few minutes. If you stand on frozen hydrogen, it will instantly melt, creating a zero-friction surface, causing you to fall over, which will probably result in one or more of the above happening. If you run or jump too hard, gravity is low enough that you risk either exceeding escape velocity and disappearing into space, or crashing into a mountain at lethal speeds.
• Deflector Shields: Stasis field. Only problem is that nothing inside can go faster than 16.3 m/s, rendering most projectile weapons useless, and any living thing not wearing special armor dies instantly when inside of it. Which means that inside of the field, it's a Sword Fight.
• Drop Ship
• Earn Your Happy Ending: It takes 1,143 years, but Mandella does. With the only other surviving member of his original squad, Marygay. And Babies Ever After. The End.
• Eternal Prohibition: Averted. Marijuana cigarettes are commercially available, and at the end of his first tour Mandella finds heroin being sold in the officer's mess.
• Everyone Is Gay: Literally. After a world-wide famine, The Government encourages homosexuality ("homolife") as a means of population control. Gradually, as such people get drafted into the military and the practice expands, this makes Mandella one of the few straight men left in the service, and the human race.

The work bizarrely self-subverts this trope when Although it might be unfair to claim that that's representative of a gay-is-a-disease attitude on the author's part, since

However, in the sequel Forever Free

• Explosive Leash/Self-Destruct Mechanism

• Faster-Than-Light Travel: Falling through a collapsar will take you to another collapsar instantly, with no limit on the distance between the two. The whole galaxy can be crossed in this manner—if you don't mind driving through normal space for a couple of years to get from your exit collapsar to the next entrance collapsar.
• A Father to His Men: Subverted. Mandella tries to be this but his 'deviant' sexual practises, the fact that he can't comprehend their language and culture, and the suspicious death of a soldier who tried to assassinate him, all exacerbate the normal tension the grunts feel towards their Commanding Officer.
• Field Promotion: Mandella starts as a private, and ends the war as a major commanding his own ground force. Not because he's particularly suited for command, but because he's adaptable, and it looks odd for someone who's been in the military for 500 years not to be an officer.
• The Film of the Book: Coming in 2013, to be directed by Ridley Scott. "I've got a good writer doing it" has been reported to be David Peoples. Unfortunately this may be a misunderstanding.
• Forever War: Not the Trope Namer, but a shining example.
• Free-Love Future: By law no-one can be conscripted into the military unless they are already promiscuous, and in basic training all recruits have a 'sleeping roster' where they're assigned a different partner every night (which leads to grumbling that you always get the dead-tired ones when you're horny, and vice versa). By the end of their first tour everyone has settled into a regular (though still not strictly monogamous) relationship with someone, so they don't like it when a rumor spreads that the roster will be resumed.
• Frickin' Laser Beams: Each Powered Armor suit has a laser built into one of its fingers, which can melt through steel.
• Future Slang: Someone or something that gets killed/destroyed is said to have gotten "caulked."
  • When a hospital worker sees Mandella's image over the phone, and realizes she's talking to one of the few living veterans of the War, she says, "That's max!"
• Gay Best Friend: Charlie Moss, Mandella's executive officer.
  • In a weird way, this is an inversion of the trope. By that point in human history, pretty much all humans are homosexual (see Everyone Is Gay, above). So it's more the case that Mandella is Charlie's Straight Best Friend.
• Gender Neutral Writing: When Mandella rejoins civilian life (the first time), he discovers people are now saying "tha" for he/she, "thim" for him/her, and "ther" for his/hers.
• Humans Are the Real Monsters
• In the Future, Humans Will Be One Race: When Mandella returns to Earth its thousands of years after he left, everyone on Earth is a nice even tan, with dark hair and eyes. This was done deliberately through eugenics, in an attempt to remove racial conflict.
• Inertial Dampening: To avoid being liquefied while aboard spacecraft that can pull accelerations of up to 25g, humans use the immersion in a fluid method. Since the spaceships tend to change velocity at high speeds, support for internal organs is needed as well. This is accomplished by injecting the characters with special substances and placing them in special suits, wherein they are then surrounded by extremely high pressure fluid, equal to several kilometers underwater. The results of the pressure failing are not pleasant.
• I Will Wait for You: Mandella and Marygay, who have stuck with each other through firefights, injuries, and the loss of everyone and everything they've ever known, are separated by being given different military assignments. The death toll in the war is horribly high, and Time Dilation caused by near-lightspeed travel means they can never expect to see each other again. Mandella mourns for her as if she's dead, but doesn't take up with anyone else because in the future that he's been thrust into by the time dilation, everyone else is gay.
• Knight in Sour Armor: Mandella.
• Last Stand: 126 Humans against 600 Taurans backed up by a cruiser. Then the cruiser got whacked by a rogue missile.
  • After the final melee, it's closer to 28 Humans against 300 Taurans. To prevent another melee and eventual Tauran success they pull out the last nukes (not actual nukes, but they have a similar effect) and detonate them just outside the stasis field.
• Lie Back and Think of England: during his stay on Stargate, Mandella mentions that military women are compliant and promiscuous, by military custom and law.
• Living Relic: The soldiers who manage to survive their tours of duty find themselves in this situation. Few and far between due to high mortality rates, they return to their homes centuries later only to find entirely new and alien cultures.
• Make It Look Like an Accident: The soldier who tried to frag Mandella dies on the operating table (after he attempted suicide) under the care of a doctor who has a covert attraction to Mandella. Unfortunately the suspicious timing of this death offsets the morale problems he avoided by not having him Thrown Out the Airlock.
• Manipulative Editing: Mandella is interviewed on his return to Earth and asked silly questions like "What do the Taurans smell like?" He replies that you can't smell anything inside a spacesuit. The press (which is controlled by the UNEF) reedits the footage to make him say that the Taurans smell so awful they make you want to throw up. They also remove all reference to the soldiers being conditioned to kill.
• Mars Needs Women: Subverted.
• Military Academy: Subverted. Officer Training is done via Upgrade Artifact.
• Mohs Scale of Sci Fi Hardness: Fairly hard. Yes, there's Faster-Than-Light Travel, but there's a lot of conditions on it, and Time Dilation is a bitch. The work is also is very realistic about the Pluto-orbit-range planetoids much of the action takes place on. Piles of powder in bins marked 'oxygen.' And the weakness in the super-powerful powered armor implied below is because the suits have radiators on their backs - the effect of even a body-temperature radiator landing on a chunk of frozen gas is "like a hand grenade going off between your shoulders."
  • They've also got "tachyon bombs", and a "tachyon drive" on their space ships that never seems to run out of fuel. In 1997.
• The New Rock and Roll: Mandella says that all art in the future - music, movies, literature - sucks.
• No Heterosexual Sex Allowed: Due to massive overpopulation, heterosexual contact and sex is entirely outlawed and considered lewd. Whatever reproduction there is occurs by artificial insemination. The heterosexual male time-traveller runs into problems with his preconceived notions of decency.
• Powered Armor: Just don't fall or take a hit to your back.
• Poor Communication Kills:
• Portal Network: The collapsars form a naturally-occuring one.
• Ramming Always Works: Justified, since the ramming object is moving at 0.99 c. Close to lightspeed, it hardly even matters what it is that rams your ship, you're toast; aiming is rather more difficult, however, unless it's something big, like a planet.
  • Or what your ship rams. "The logistics computer calculates that we have about a 62 percent chance of success, should we attempt to destroy the enemy base. Unfortunately, we would only have a 30 percent chance of survival - as some of the scenarios leading to success involve ramming the portal planet with the Anniversary at the speed of light."
• Sequel: Forever Free.
• Sci-Fi Writers Have No Sense of Scale: The tachyon bombs that the troopers are hurling around in Mandella's first assignment are "microton" weapons. A microton device would be an explosive with the same yield as one one-millionth of a ton of TNT, or about 1 gram of TNT. This is about the same explosive yield as an old M-80 firecracker; it wouldn't be enough to blow open a locked wooden door, let alone excavate a crater.
• Schizo-Tech: No energy weapons can work inside the status fields so swords, quarterstaffs, arrows and throwing darts are used. Also happens due to Time Dilation when you might find yourself fighting alien technology from decades in your future, or vice versa.
• Shown Their Work: Haldeman has a degree in astronomy, first hand experience as a soldier in wartime, and does the calculations on any math he deems important to the story.
• Sliding Scale of Idealism Versus Cynicism: Very, very cynical.
• Space Marine: They're technically Army, not Marines, but close enough.
• The Spartan Way: three recruits die in training on earth. The survivors are sent to continue their training on a Death World, where the slightest mistake (or just bad luck) can be (and is) lethal, and any disobedience is punishable with summary execution. The final test involves surviving a surprise attack with live missiles.
• Spiritual Successor: Forever Peace.
• Starfish Aliens: The Taurans.
• Stranger in a Familiar Land: Played to devastating effect. Mandella and Potter's return to Earth after their first tour of duty. Needless to say, the two re-enlist in the Army and get off the planet.
  • Note that they only re-enlisted with the assurance that they'd be stationed on the Moon as instructors. On arrival at their new station they are immediately reassigned to fight in another star system.
• Trigger Phrase: The poem Scots Wha Hae by Robert Burns, seemingly the words of Robert the Bruce to his troops before the battle that would win Scotland's independence.
• Take That: Some considered the novel to be an attack on Robert Heinlein's Starship Troopers. However, The Old Man himself once went up to Haldeman and congratulated him for writing "the best future war story I've ever read!"
• Time Dilation
• Twenty Minutes Into the Future: At least in the beginning...
• Black Holes Suck: Collapsars used for FTL travel. The book was first published in 1974, so it may actually 'predate' the astronomical use of the word
• War Is Hell: We're fighting them because they are fighting us because we are fighting them because...
• Weapon of Mass Destruction: The Nova Bomb.
• We Will Spend Credits in the Future: When Mandella returned to Earth, a famine had resulted in the adoption a Global Currency based around food rationing: the kilocalorie, or "K". One dollar in 1997 money was worth about a hundred K.
• Write Back to the Future: Cleverly done by Marygay. She
• You Can't Go Home Again: Due to Time Dilation, every time Mandella returns from a combat mission he has to deal with a military, government, and society that is virtually alien to him.

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