Bolo

"Bolos might fail. They might die and be destroyed. But they did not surrender, and they never -- ever -- quit."

A series of stories, originally by Keith Laumer, that were later expanded into a Shared Universe by other authors. They detail the exploits of the Bolo, autonomous AI tanks that are supposed to have evolved from the standard main battle tank of the 20th century.

These aren't your normal tanks. For one, their designers decided that bigger was better, and since the only thing that could really take down a Bolo was another Bolo, they just kept building the Bolos bigger and bigger, to the point where even the stealth tanks mass 1,500 tons.

For another, they are keenly intelligent, often with surprisingly human personalities. Quite a few of the stories focus on the relationships between the Bolos and their human commanders, because no matter how well they get on, the mountain of armour-clad metal bristling with weaponry is programmed to/wants to (the line gets murky at times) defend the squishy humans at all costs. For while there have been Bolos who were historians, knights, poets, spies and gardeners, they are warriors first and foremost, born to fight alongside their human comrades.

Not to be confused with someone the police wants to find.

The proud history of the Dinochrome Brigade provides examples of these tropes:

 * AI Is a Crapshoot: Averted. Hard.
 * Played with in "Traitor." It turns out that a supposedly "rogue" Bolo took a massive amount of damage to what is essentially its brain and thought everything with a weapon was trying to attack  (Including other Bolos). That's right: in order for a Bolo to go rogue, it had to have a massive chunk of its brain vaporized. And even then it was still trying to protect humanity.
 * Another story involved a Bolo that literally drives itself insane with the paranoia involved in working out untold trillions of scenarios for alien attack on the planet it's protecting. Once it goes insane, it becomes even more dependable, since . The Bolo recovers after an attack, which breaks the endless self-reinforcing programming loop that created its paranoia.
 * Alien Invasion
 * Apocalypse How: The Final War ends in a Galactic Societal Collapse for both sides, with a large number of Total Planetary Extinctions.
 * Army of One: Many stories involve individual Bolos defeating vast hordes of enemies. There aren't many foes a Bolo needs backup to take down.
 * Badass Army
 * Bee-Bee Gun: In the novel The Road to Damascus, written by Linda Evans and John Ringo, at one point in an alien invasion of their world, some protagonists throw the bee hives used for making honey into a barn where several of the invader's soldiers are found, the stings of the swarming bees, designed to be more aggressive than normal to force out native competitors, killing the soldiers.
 * Colony Drop: Ziggy in Old Guard. After the ship carrying him to the contested planet is shot out from under him,
 * The Constant: In "The Night of the Trolls"
 * Corrupt Corporate Executive: If it's not aliens, it's usually these who are the enemies of the Dinochrome Brigade.
 * Crew of One
 * Deployable Cover
 * Determinator: See the page quote, above.
 * Deflector Shield: "Battlescreens" provide protection, do Energy Absorption and render physical impacts harmless, so killing Bolos requires Energy Weapons or really big explosions.
 * Downer Ending: A lot of Bolos tend to sacrifice themselves for the sake of humanity, and the Bolos are generally the most likable characters in the story, so...
 * the end of "Though Hell Should Bar The Way," kinda takes the cake, though.
 * Driven to Suicide
 * Dungeon Bypass: As they grow bigger and heavier, the concepts of 'obstacle' or 'barrier' become less meaningful -- they blow everything in their way up, iron it flat through the sheer weight of their passage, or both.
 * Bolo Mark 33's take it one step further. Mk. 33 is 32,000 tons, has more guns than any previous model, is the largest Bolo type ever made, and, oh yeah, one more thing: it can fly at 500 kilometers per hour (310 Miles Per Hour.) One tiny little detail after that- they were made to operate in groups of 24. So if it can't be flown over, run over, or blasted out of the way by one Bolo, chances are that it won't stand up to twenty-three more.
 * Energy Absorption: Naval ships and later model Bolos have "Battlescreens", which both absorb attacks a la force shields AND transfer the absorbed energy to the onboard batteries.
 * The Federation: Here called the Terran Concordiat.
 * Fictional Document
 * Forever War: The Melconian-Human 'Final War'. Nobody knows who started it because those present at the first battle were in no condition to report afterward, and it didn't end so much as run out of planets to kill. A few million survived out of trillions on both sides.
 * The situation was recognized as being so dire that the humans (and the Melconians likely did this as well) sent colony ships on one-way trips beyond the farthest reaches of explored space, in hopes that at least one colony might escape. It worked, after a fashion.
 * Fumbling the Gauntlet: One of the key stumbling points in the Final War is known: Standard Melconian First Contact procedure is to forbid all contact between the two cultures until their ruling body comes to a decision, and took a hard line against any attempts at contact. The Concordiat policy is to get a mutual non-aggression agreement in order to normalize relations as soon as possible, and kept trying to make contact with the Melconians. The Concordiat thought the violent refusal to speak meant Melconians were hostile. Melconians thought repeated attempts to make contact meant the Concordiat was hostile. Neither side could comprehend the other's actions.
 * Fun with Acronyms: A Bolo's unit designation is a three-letter alphabetic designator. His name is usually recursively based on it; for example, the very first self-aware Bolo, a Mark XX designated DNE was called "Denny" by his commander and support crew.
 * Forgotten Superweapon: In "A Relic of War" a Bolo sits in the courthouse square of a small town. The children play on it. Several other stories feature lost Bolos reactivated by chance or hiding out as tractors.
 * Gender Is No Object
 * Heroic Sacrifice: A common occurrence with Bolos.
 * Honor Before Reason: Bolos picked up a bit of this. In Laumer's short story "Field Test," the first self-aware Bolo makes a suicide charge Out of the Inferno that causes the enemy to break and run. When asked why, they expected it to demonstrate some superhuman strategic acumen that it's human commanders missed. They're awestruck by it's real reason: "For the honor of the regiment." This has since become the catch phrase of the Bolos.
 * Human Popsicle: In "The Night of the Trolls".
 * Humans Are Bastards: A common theme in many stories, but especially prevalent in "Road to Damascus."
 * Notably, Bolos spend a lot of time explaining to their commanders (Who sometimes take a dim view of their fellow humans) that humans are not a race of total bastards.
 * Impossibly Graceful Giant: Bolos are often described as moving far more gracefully than a multi-thousand-ton block of flintsteel has any right to.
 * Instant AI, Just Add Water: Averted. The first Bolos are not only non-sentient and unintelligent, but merely big tanks with some automated features. Later automation that lets them operate without a human is STILL not intelligent and can only follow pre-set mission plans unless a human is there to tell it what to do. It takes centuries of directed AI research before the big, automated tanks become sentient in any meaningful way.
 * I Shall Fight No More Forever: In one short story set at the very end of The Final War, a Bolo has become so sick of the bloodshed that he refuses a direct order from his human commander to attack a hopelessly outmatched Melconian force.
 * Kill Sat: In Ploughshare, the orbital communication satellites help turn the tide of battle. It helped that they
 * Knight in Shining Armor: The Bolos are designed as such. And since they're machines without human weaknesses, (instead their own robotic ones) they are able to live up to the ideal.
 * Taken literally in Camelot, where Bolo unit 721-KNE is knighted and takes on the name Sir Kendric Evilslayer.
 * La Résistance
 * Lightning Bruiser: The Mark 33 Bolo masses 32 thousand tons. Its top speed? 500 KPH (310 MPH) when in flight (yes, you read that right), and 105 KPH (65 MPH) when on land.
 * Ludicrous Precision: In dialogue (internal or with others) Bolos always measure things down to hundredths of a second or less.
 * Macross Missile Massacre: Standard fit for most marks is a VLS battery mounting everything from SAMs to ICBMs.
 * Magnetic Weapons: Part of the secondary armament from time to time; one type of infinite repeater is a rapid-fire coil gun.
 * Mayfly-December Romance: One story has a prototype Bolo  Subverted heartbreakingly at the finish.
 * Medal of Dishonor: Sonny in The Road To Damascus gets one of these every time his corrupt government masters use him against civilian protesters. When he finally begins his Zeroth Law Rebellion, his first act is to shoot the medals off.
 * Military and Warfare Tropes: Pick one. Chances are it's in here.
 * Military Mashup Machine: Later Marks of Bolo are Land Battleships. And with the drones and flight ability the last ones become full fledged airborne aircraft carriers.
 * More Dakka: The "infinite repeaters" fitted as point defense/antipersonnel weapons can be anything from flechette launchers to railguns to lasers. Later models even use smaller versions of the Hellbore Wave Motion Guns as their "infinite repeaters."
 * Mundane Utility:
 * One Bolo once had a huge bulldozer blade mounted on its front armor so it could do some excavation work. Others have disguised themselves as giant tractors, or even been put in orbit as comsats.
 * In one story, a de-militarized Bolo was put into use for agriculture. However, while its weapons were removed, the directive to protect humanity wasn't, and it used its biological research and manufacture abilities to engage in biological warfare to defeat the alien attackers.
 * No Plans, No Prototype, No Backup: Used, but also subverted. Especially a few prototype units lost in the war where the depots working on them were taken out. The Mark 33s and beyond are these as the factory on Luna that built them was blown up with the rest of the moon.
 * Nuclear Option
 * Nuke'Em
 * Old Soldier: As mentioned, Bolos can stay in fighting shape for a very long time.
 * One Tank Army: A main battle Bolo is a Made of Iron Super Soldier with centuries of experience of tactics. If they're on your side, they're your best friend and The Cavalry rolled into one. If they aren't on your side, you're in for a world of hurt.
 * Phlebotinum Overload
 * Pick Your Human Half
 * Precision F-Strike
 * Psychic Link:
 * A technological subversion. Many later model Bolos have the ability to network their knowledge/senses for increased battle awareness.
 * Mark XXXIIIs take this one step further; they can directly link with their human commanders, giving the combined human/bolo awareness both the massive logical processing, battlefield expertise, and centuries of experience possessed by the Bolo, and supercharging the inductive logic humans possess up to Bolo thought-speed, which was the original goal of the human/bolo mindlink. As an unexpected side effect, while Bolos are safeguarded up to the eyeballs to keep them from losing control over their emotions and bloodlust during combat, humans have no safeguards.
 * Proud Warrior Race: The Bolos seem to have been half-programmed, half-developed into this.
 * Read the Freaking Manual: Used as the punchline to an epic Incredibly Lame Pun.
 * Reassigned to Antarctica: One story is about an out-of-the-way colony that demands a military outpost, hoping to get a full base full of soldiers with money to spend on their local economy. The interplanetary government doesn't want to, because of the massive expense and nonexistant strategic value of the colony, but it's the colony's right to have one if requested. It turns out the regulations don't actually specify how many soldiers are required, but merely a minimum logistical value... so they can send a single older bolo and a single pilot. The pilot's career is unlikely to advance further in such a location, and the locals hate them for not being that economy-boosting full detachment of soldiers (Of course the Bolo and pilot turn out much more useful than the base full of soldiers, eventually).
 * Robosexual: Not actually carried through to the trope's logical conclusion, but several Bolo commanders have been mentioned as having developed romantic feelings towards their Bolos. This is recognized as a major issue for human commanders, who grow too attached to the Bolo they command and are devastated when the Bolo is killed in combat.
 * Robot Names
 * Sapient Ship: Bolos from the Mk. XX model onward are sapient, although before the Mk. XXIV the sapience was only in combat mode. Prior to the Mk. XX, their computers never exceeded limited, partial sentience at best, and the really early models were simply automatons that eased the workload of their human operators.
 * Screw This, I'm Outta Here: A mercenary captain's reaction upon learning that a Bolo is active, even though he has two rough analogs to Bolos under his command. Though he can't leave as he's already taken delivery of his payment, and his employers would be... unhappy.
 * Spaceship Girl:
 * Some Bolos are quite female and feminine while being space-capable, with male service crews reacting appropriately. A gender inversion (masculine Bolo, a female crewmember's fixation) also occurs.
 * In "Miles to Go," one commander falls in love with his female-persona'd Bolo.
 * Standard Sci-Fi Army: While the stories focus on Bolos, we do see infantry and other units from time to time. Usually while being torn to pieces by a Bolo.
 * Standard Sci Fi History: From World War Three (stage 2) up to the first hints of recovery after the collapse of the Concordiat (early stage 5.5).
 * Super Prototype: Nike from "Miles to Go" was an advanced AI testbed which was accidentally forgotten about on a backwater planet. Despite it taking eighty years for her to be rediscovered, she's still smarter, faster and deadlier than the production models which 'replaced' her, since the attack which destroyed the record of her location did the same to the lab which built her.
 * Tank Goodness: Takes this further than anything. A Mark XXXIII is a literal Land Battleship that can fly, with enough firepower to be designated as "Planetary Siege Units." Earlier models were mere "Continental Siege Units", as in, one Bolo could lay siege to an entire continent.
 * There Is No Kill Like Overkill: Played straight, subverted, averted, played with... This series does it all. Played straight in that... well, if you've gotten this far on the page and you can't see how this is played straight, you should probably just go back and re-read them. Also, some Bolos are given to pull a Roaring Rampage of Revenge if their commander is killed. Averted, though, as Bolos are also highly intelligent, and will often point out ways that do not involve blasting their enemies with their most powerful weapons until the ground is a radioactive cinder. Why use the anti-starship gun when you have an anti-personnel rifle with pin-point accuracy that works just as well? On occasion, Bolos will even suggest a method of resolving a conflict without further bloodshed.
 * True Companions
 * Turned Against Their Masters: Rare, but when done the Bolo in question will still, at some level, continue to fight being subverted. It WILL escape control, and then it WILL come for you.
 * War Is Hell: Even Bolos can be affected in the end.
 * Warrior Poet
 * Wave Motion Gun:
 * Hellbores, the standard armament on Bolos, are fusion cannons rated in megatons per second, the weapons derived from the main guns of space battleships. The larger Bolos mount several, and later models of Bolos are fully capable of engaging and destroying orbiting warships.
 * A few stories include Bolos equipped with Hellrails, several Hellbores of larger output than the main weapon, which can only fire upwards. These are explicitly for engaging spacecraft in orbit.
 * At least one story explicitly mentions that the mere existence of these weapon systems has rendered combat aircraft obsolete. Literally the only vehicle capable of surviving combat against a Bolo long enough to matter is another Bolo.
 * Basically, if at any time the Bolo can draw a straight line between itself and you, you are in Hellbore range and therefore only exist as long as it allows you to.
 * During the Final War, standard procedure was to approach any planet with a Bolo on it from the opposite side of the planet as the Bolo. Using the planet itself as cover so the Bolo won't shoot down your spacecraft.
 * Wham! Episode: For all of the stories "The Greater Machine," and "Though Hell Should Bar The Way," it's known that aliens are supplying the Terse with advanced weapons (they're a bronze-age culture, and they have plasma cannons.)
 * What Measure Is a Non-Human?: Gets a bit weird when the tanks themselves angst over their human colleagues growing too attached to them.
 * In one story a Bolo states that the reason Bolos carry a human commander on-board is a deliberate attempt by humanity to subvert this. The human doesn't noticeably increase the Bolo's fighting capability but humans feel a need to share the danger that they send the Bolos into.
 * At one point in "Though Hell Should Bar The Way", one character has a rather horrified Not So Different moment when she realises that
 * You Shall Not Pass: A fairly common way for Bolos to go. The Legacy of Leonidas is Thermopylae In Space.