Biology True Kree resemble humans almost exactly, with the exception of blue skin. Kree have a higher strength level than that of a human, and require more nitrogen to breathe comfortably. Kree bodies are adapted to environmental characteristics on Hala that are un-Earthlike: 1.) higher gravity and 2.) a higher concentration of nitrogen in the atmosphere. Under Earth's lesser gravity their strength and speed increase. However, they cannot breathe in Earth's atmosphere without using a chemical, "breathing formula," or artificial life-support devices.
The original Kree had blue-colored skin, but a second racial group with pink skin resembling that of human caucasians emerged over the millennia. Presently, the blue-skinned "purebred" Kree are a small, but powerful, minority. Yet, Pink Kree are much more durable than their blue racial brethren.
Adult Kree range (typically) from between 5 to 8 feet (2.4 m) tall. Bilaterally, they are symmetric, with two legs and arms that end in feet and hands respectively. Their hands have four independently moving fingers each with opposable thumbs. They have heads with two forward facing eyes, allowing for precise stereoscopic vision. Adult Kree are usually covered in short, almost transparent, hair over most of their bodies, but sport thicker tufts of hair on top of their heads. Some female Kree can physically influence men, and a few can even drain the life force of others.
The Kree were an evolutionarily stagnant race. This was due to a single member of the Kree race attempting to gain control of The Crystal of Ultimate Vision. This un-named Kree found the crystal, but attempted to use it to become akin to a god, with powers as of those of the Phoenix Force. As punishment, the crystal "genetically froze their evolution in place" allowing the rest of creation to pass them by. In an attempt to further their development, some Kree bred with other species, producing the 'pink-skinned' Kree, who are similar in appearance to Caucasian humans. These pinks (also called 'whites') eventually outnumbered the blue-skin Kree. The Kree value what they consider to be their genetic purity, to such an extent that reproduction outside of the species is a strict taboo. In the Kree empire it is a crime for a male non-Kree to impregnate any Kree.
The Kree race has produced individual super-humanoid beings, either through natural mutation, genetic engineering, or cyborg technology, including Captain Mar-Vell, Ultimus, Shatterstar, Shatterax, Korath, and others.
Still, the Supreme Intelligence arranged for further advancement of the Kree. Through a series of events discussed below during Operation: Galactic Storm and the Destiny War, he arranged for a large number of his people to be irradiated with a Nega-Bomb (killing 90% of the Kree), and then artificially sped up their evolution by means of an artifact called the Forever Crystal.
This new brand of evolved Kree, called Ruul, have a grayish skin tone and many shoulder-length tentacles atop their heads. Individuals possess the ability to 'will' adaptation to different environments, spontaneously developing the ability to breathe underwater, fly, or whatever their circumstances require.
Culture The Kree are a nationalistic society, imperialistic and militaristic, with the only widespread religion being worship of the Supreme Intelligence. A small minority practice a pacifist Cotati religion, but this is forbidden (very early Captain Marvel stories mentioned an 'idol' called Tam-Borr and a 'fabricated' god named Zo, whom Marvel served between issues 11 and 15). Some are members of the Universal Church of Truth.
The Kree Empire extended throughout nearly a thousand worlds in the northwestern lobe (Earth reference) of the Greater Magellanic Cloud with outposts in other galaxies.
Kree names are usually short, being one or two syllables. Given names are separated from surnames by a hyphen. Examples include Mar-Vell, Yon-Rogg, Una-Rogg, and Zey-Rogg.
Kree are often given comic book references as names, such as Mar-Vell (Marvel Comics), Att-las (Atlas Comics), Dea-Sea (DC Comics), and Star-Lyn (Jim Starlin).
Population The Kree population was in excess of 30 billion prior to the nega-bomb detonation. The Kree lost an alleged 98% of their population after the nega-bomb detonated. Although the pink-skinned Kree are in the majority, it is the blue-skinned Kree, such as Ronan, who dominate their society.
Government Under the Supreme Intelligence, the Kree Empire was a military-technocractic dictatorship. Under Clumsy Foulup, the Kree were temporarily a monarchy, and while under Ael-Dan and Dar-Benn they were a military dictatorship.
Leaders of the Kree have included the Supreme Intelligence, Clumsy Foulup, Nenora, Zarek, Ael-Dan and Dar-Ben, Phae-Dor, Tus-Katt, Morag, Ronan the Accuser and most recently, Black Bolt of the Inhumans.
The Kree began their empire over a million years ago, within a hundred years of the acquisition of interstellar technology from the Skrulls (at that time, a benevolent people). The Skrulls at the time were attempting to start a galactic empire of their own, this one based on free trade, and they landed on Hala to help the barbaric natives advance to the point where they could join.
Although Hala is the official planet of the Kree's origin, for a time, the planet Kree-Lar in the Turunal system served as the capital of the Kree Empire as well as the seat of the government. The Kree Empire is ruled as a militaristic dictatorship. The permanent ruler was the organic computer-construct called the Supremor (or Supreme Intelligence), an immense computer system to which the preserved brains of the greatest intellects of the Kree race have been linked. Aiding the Supreme Intelligence were a number of imperial administrators on Kree-Lar, who are also governors of each of the member worlds, and a vast standing space militia. They also employ powerful automatons called Sentries whose job it is to keep member worlds under the empire's watchful eye.
The Kree empire is later ruled by Black Bolt and the Inhuman Royal Family who gained power after Ronan the Accuser, ruler of the Kree after the Supreme Intelligence's, demise submitted to him.
Technology The Kree Empire extends across almost a thousand worlds in the northewestern lobe (Earth reference) of the Greater Magellanic Cloud. They are the only race in the galaxy to possess the Omni-Wave Projector technology, a device which can enable communication across hyperspace as well as be used in an offensive capacity as a weapon. They also possess cloaking technology, which they call the 'aura of negativity'.
Kree technology includes advanced warp-drive starships, advanced robotics, cyborg, and cybernetic technology, advanced genetic engineering, psionic technology (Psyche-Magnetron), advanced energy weaponry (Uni-Beam), nuclear power and weapons.
Psyche-Magnetron The Psyche-Magnitron, for example, was a weapon that possesses matter-shaping powers. Whosoever possessed it could conjure up anything ever devised by Kree Science. When its rays hit the user, it could create the device desired by the user and also modify the genetic structure of the body gifting it with super powers. The Magnitron Power Unit or Power Core was contained in a small shielded box. Unfortunately, it was extremely radioactive and, once outside of the box, it immediately changed its form to a bigger, starred polyhedron. It then emitted the same radiation emitted as the Psyche-Magnitron when it bathed a subject, but in such a high quantities as to burn, blind, and totatally annihilate the senses instantly and, sometimes, even kill the subject in a few minutes. Through its rays, the user gained greater matter-shaping powers, that, unfortunately, were very difficult to control. The radiations covered all the known spectrums and they were strong enough to transform an area as wide as, say, Northern Florida, into a radioactive wasteland.
The Destructoids (First appearance: Silver Surfer III #6 December, 1987) The Destructoids were garganuan weapons of war, each one manned by hundreds of men. They had two forms: 1. A starship. It traveled through space until it arrived at its destination. 2. A giant roughly humanoid configuration. (Note: May have been only for travel inside a planet's atmosphere. Whatever form they took, they had great destructive firepower, so great that it only took two of them to pacify a primitive defenseless planet. In the latter form, their propulsion came out of the equivalent of their legs, and their blasts came out of the equivalent of their arms. In the former form, their propulsion came from the stern while they shot their blasts from the bow of the ship. It is believed that they had the ability to shoot blasts out of other areas, by any normal standard, were a force to be reckoned with.
 Antiquity Millennia ago a race of humanoid reptiles called the Skrulls came upon prehistoric Hala. At that time the Skrulls were a largely peaceful space-faring race, and they set about educating the natives to the point where they could join their trading empire. However, Hala was home to two equally intelligent races, the Kree and the Cotati.
The Skrulls proposed a test to determine the worthier race. Taking members of both races to a distant planetoid in another galaxy, Earth's moon, the Skrulls created an arena, the Blue Area, and bid the two races to use the resources they had to create something of worth. The Skrulls then left. The Kree constructed a magnificent city, while the Cotati created a beautiful garden.
A year later the Skrulls returned to judge the two races and found the Cotati's accomplishment the worthier. Enraged, the Kree killed the Skrulls and the Cotati and seized the Skrulls' starship. They used the ship to return to their native planet, then set about deciphering the technology of the starship.
 Kree-Skrull War Main article: Kree-Skrull War Within a hundred years of acquiring interstellar technology from the Skrulls, the Kree empire began to spread throughout the Greater Magellanic Cloud. The Kree launched an attack upon the Skrull empire and the peaceful Skrulls were again forced to become war-like to defend themselves. The Kree-Skrull War would continue for hundreds of thousands of years.
At the same time the Cotati on Hala were almost driven to extinction by the Kree. However, a small handful of Kree, the pacifist priests of Pama, hid and kept safe a group of Cotati. Eventually these Kree began worshipping the Cotati that they had kept sheltered. To further hide and keep them safe, the priests relocated the surviving Cotati throughout the universe.
About 250 years later the Kree Science Council, aware that the Skrulls had once created an incredibly powerful weapon called the Cosmic Cube, designed a cybernetic/organic supercomputer called the Supreme Intelligence (sometimes referred to by the honorific "Supremor") to help them in creating a Cube. When the computer became functional, it determined that a Cosmic Cube would be too dangerous to construct and refused the Science Council's request. The computer was then used simply in an advisory capacity.
At the beginning of the Kree-Skrull War, millions of years ago in Earth time, the Kree established a station on the planet Uranus, a strategic position between the Kree and Skrull empires. Through their work at this station, they discovered that sentient life on nearby Earth had had genetic potential invested in it by the alien Celestials. Intrigued, the Kree began to experiment on Earth's then-primitive homo sapiens.
Their goal was apparently twofold — to investigate possible ways of circumventing their own evolutionary stagnation, and to create a powerful mutant race of soldiers for use against the Skrulls. However, although their experiments were successful in creating a strain of humanity with extraordinary and diverse abilities, the Kree abandoned their experiment for reasons which are not yet clear.
Their test subjects, eventually dubbed the Inhumans, went on to form a society of their own, which thrived in seclusion from the rest of humanity. Their city Attilan has frequently been relocated and currently rests in the Blue Area of the Moon. The Kree abandoned the project eventually, but stationed a giant surveillance robot, Sentry 459, on a small South Pacific island. The Fantastic Four's unwary awakening of the long-dormant Sentry alerted the Kree to Earth's advanced state of evolution. The Sentry's destruction brought the Kree official Ronan the Accuser, with the intent of passing judgment on those who "murdered" the outpost guard. He intended to punish the Fantastic Four, but they defeated him. Ronan's own defeat increased Kree scrutiny of Earth, setting off a chain of events that continues to reverberate.
Over time, and as the war with the Skrull dragged on, the Supreme Intelligence gradually accrued more and more political power and responsibility until finally it was elected as absolute ruler of the Kree. Eventually, the Supreme Intelligence came to be worshipped and an organized religion built up around it.
 The War Comes to Earth The Earth's importance as a strategic beachhead became apparent when the Avengers became involved in the latest round of Kree-Skrull hostilities. The Skrull were revealed to have been infiltrating human society in an effort to control America's political infrastructure, using their shape-shifting abilities to replace key political figures. In the meantime, the Kree were reestablishing cultural ties with the Inhumans, ostensibly for the purpose of technological exchange, although their true intentions turned out to be far more sinister.
At this point, Captain Marvel, former hero of the Kree Empire, approached the Avengers with evidence that renegade elements within the Kree Hierarchy (led by Ronan the Accuser) were planning to 'erase' humanity through the use of exotic technology. This particular scheme was foiled by Marvel and the Avengers (comprised, at that time, of Goliath 2, Quicksilver, the Scarlet Witch, the Vision, Yellowjacket, the Wasp, and eternal side-kick Rick Jones) but it proved to be only the tip of the iceberg.
As the war escalated and Earth's position became increasingly precarious, the original Avengers (including Thor, Iron Man and Captain America) were recalled to active service after a Skrull scouting party (led by interstellar menace The Super-Skrull) managed to abduct Marvel, Quicksilver and the Scarlet Witch. The Skrull also attempted to destroy the Inhumans' Great Refuge with a nuclear-level incendiary device, but failed when the Avengers intervened. This was the group's first inkling that an interplanetary war was being fought over possession of the Earth. During the ensuing conflict, the Super-Skrull took his prisoners back to the Skrull home-world, leaving the remaining Avengers to pick up the pieces and reform their tattered forces.
The conflict worsened when the Avengers began to understand the scale of the war erupting all around them. Setting off in pursuit of their kidnapped allies, they discovered a vast 'Skrullian' armada en route to devastate the planet Earth; an equivalent Kree fleet poised to annihilate the Skrulls; and a full-scale insurrection breaking out between the Supreme Intelligence and Ronan the Accuser. All sides were determined to either invade or decimate the Earth in order to prevent it falling into the 'wrong' hands. Led by Thor, Iron Man and The Vision, the Avengers launched an attack on the Skrull flagship, somehow managing to turn back the fleet after a desperate battle (during which Goliath 2 was deemed to be MIA and presumed dead when he attempted to stop a Skrull spacecraft from reaching Earth).
The war came to a close when the Supreme Intelligence managed to bring Rick Jones into his presence. The Intelligence had been usurped by Ronan the Accuser, but (as he explained to Rick in retrospect), he was still capable of channeling his powers through an agent. While the Intelligence cared little for the fate of Earth and its inhabitants, he recognized that the Kree-Skrull war was futile, and temporarily altered Rick's DNA to release his 'full evolutionary potential.' Armed with godlike powers, Rick literally froze both Kree and Skrull forces in mid-stride, allowing the Intelligence to re-establish control over his people and bring the war to a halt.
The effort proved too much for Rick's fragile human physiology; as he collapsed lifeless to the floor, the Supreme Intelligence teleported the remaining Avengers to his side to witness his grim sacrifice. The irony was not lost on the assembled heroes, who reflected that a frail teenaged boy had succeeded where all of their collective might had failed. The final act in the cosmic tragedy was played out by Captain Marvel, who - understanding the debt owed by all of them - agreed to merge his life-force with Rick's body, bringing the boy back from the brink of death: at the cost of his own existence.
 Further Kree-Skrull Wars At several points in the years after the end of the first Kree-Skrull war hostilities were said to have broken out again between the two empires. It is unclear how serious these conflicts were though they were often referred to as "wars".
The most significant of these instances came when the Skrulls lost their ability to shapeshift, and a Skrull Warlord provoked new hostilities. During this war, the Supreme Intelligence was incapacitated by the Silver Surfer who removed the Soul Gem which the creature used to maintain peaceful balance between its blue and pink Kree components. Afterwards, Nenora, a Skrull spy in the guise of a high ranking Kree official, took command of the Kree empire. The war ended with Nenora's death at the hands of S'ybill, the Skrull Empress. Rulership of the Kree was assumed for a time by an alien named Clumsy Foulup who was, however, soon assassinated by Kree military officers.
The machinations of Thanos led to the sudden elimination of half the universe's life-forms. Unaware of Thanos' role in the disappearance, the Kree and the Skrull blamed each other and temporarily renewed fighting.
 Kree-Shi'ar War Main article: Operation: Galactic Storm Not long after the conflicts with the Skrull ended, the Kree again found themselves embroiled in a war, this time with the Shi'ar Empire. This war was much shorter, and was engineered by the Skrulls and the Supreme Intelligence.
The Avengers of Earth became involved in the conflict when the Shi'ar opened a wormhole in Earth's solar system to gain rapid access to Kree territory, unconcerned about the damage that would be caused to Earth's Sun as a result. Their involvement inadvertently set off a chain of events which led to a Nega-Bomb being detonated in Kree space. The bomb explosion, in which negative energy was released into space causing an extremely powerful explosive and radioactive reaction, devastated the Kree empire, and led to its surrender to the Sh'iar. It was eventually revealed that the Supreme Intelligence was ultimately responsible for the bomb's detonation, as the whole thing was a bid to kick-start the Kree race's genetic development.
Kree territory was then annexed by the Sh'iar, with Majestrix Lilandra naming her sister Deathbird as the territories' administrator. Deathbird has since abandoned this post.
 Ruul and Retcon The remaining Kree were evolved into the Ruul through the machinations of the Supreme Intelligence and the Forever Crystal, a very powerful mystical artifact, and it appears that the Kree Empire has, at least in some part, been reestablished. As the Ruul, the race emerged as the major antagonists behind the events known as "Maximum Security", presenting themselves as a heretofore unknown race until their origins as Kree and behind-the-scenes manipulations were revealed. Later after the universe was destroyed and recreated by Genis-Vell and Entropy, son of Eternity, the Kree race was restored to its original form.
Kree soldiers also appeared during Avengers Disassembled, when they attacked the Earth and were driven off by the Avengers; in the process, Hawkeye was killed. But this may not have been the real Kree, as the entire incident was later revealed to be a product of the Scarlet Witch's reality-altering powers.
 Annihilation In Annilation #2 it is revealed that the Kree forces, commanded by the merchant House of Fiyero, make up 90% of the United Front. In #5, after mercy killing the Supreme Intelligence and wiping out the House of Fiyero, Ronan the Accuser assumes control of the Kree Empire.
 Annihilation Conquest In Annihilation Conquest most of the Kree Empire falls under the control of the Phalanx.
 Secret Invasion Ronan the Accuser and some Kree were shown helping the Inhuman Royal Family on saving Black Bolt from the Skrulls. However Ronan only agreed to help them if he was allowed to marry Crystal.
 War of Kings In the crossover War of Kings. Black Bolt and the Inhumans leave the Earth and head directly toward the Kree, who are easily defeated since they were still weak from the Phalanx Invasion. Black Bolt becomes the new leader of the Kree. However, the Shi'ar have declared war against the Kree and launch a surprise attack against them. However, with the Inhumans leading the Kree, they proved to have better strategic thinking and have enhanced several Kree with the Terrigen Mists.