"Only a fool fights in a burning house!"
- - Kang, 2268
As a product of 22nd century genetic engineering, Kang was a descendent from Klingons affected with the Klingon augment virus created in 2154. (ENT: "Divergence") By the 2290s, Kang was outwardly cured of this affliction either through medical treatment, cosmetic surgery, or a combination of both. (VOY: "Flashback")
Throughout his illustrious career, Kang played key roles in many legendary battles against the Federation, both on the battlefield and at the negotiation table. As a result of his prowess, Kang's status within the Empire was revered to the extent that he achieved the status of a Klingon Dahar Master. His glory further succeeded him, after his death in 2370, when he earned his own statue among the Hall of Heroes on Qo'noS. (DS9: "Blood Oath", "The Sword of Kahless")
Kang wed his wife, Mara, prior to 2268; she would later serve as Kang's science officer aboard his battle cruiser during the late 2260s. By 2290, Kang had his first son, whom he named Dax, in honor of his friend, the Federation ambassador to Qo'noS, Curzon Dax. (TOS: "Day of the Dove"; DS9: "Blood Oath")
Conflicts with the Federation
While responding to a distress call at Beta XII-A in 2268, Kang's battle cruiser sustained massive internal damage after became disabled, resulting in the deaths of 400 of his crew. As the ship drifted towards Beta XII-A, Kang beamed down to the planet to discover Captain Kirk on the surface. Kang accused Kirk of attacking his ship and took Kirk prisoner while claiming the orbiting USS Enterprise for the Klingon Empire.
Kang convinced Kirk to beam the group up to the Enterprise, where he and the remaining 37 survivors are transported aboard as prisoners. Kang's ship was further destroyed by the Enterprise because of the danger it posed due to the massive amount of hazardous radiation it was emitting.
Aboard the Enterprise, intense fighting broke out between the two groups, as the ship mysteriously hurtled toward the galactic rim. The emergency bulkheads of the Enterprise, soon after, sealed themselves, trapping 392 members of the Enterprise crew below decks.
The entire situation, including the phantom Beta XII-A colony, imaginary distress calls, the transmutation of the weapons aboard the ship, were discovered to have been engineered by an unknown energy being that thrived on the belligerent emotions precipitated from the ingrained hatred between the Klingon Empire and Federation. Through the cooperation of Mara, Kirk was able to cooperate with Kang to drive the lifeform away by generating positive emotions. (TOS: "Day of the Dove")
Relations with the Federation continued to periodically flare up throughout the latter half of the 23rd century. In one such occasion, Captain Kang, along with Captain Kor, together lead two divisions of warships in an ancient Earth cavalry-style attack on the Federation outpost at Caleb IV. During the attack, Kang and Kor successfully tricked their opponents by launching first a small initial attack, and then striking with the bulk of the forces when the Federation began repair efforts. (DS9: "Once More Unto the Breach")
Kang, Koloth and Kor, who originally set out with forty legions, together held the Korma Pass against T'nag's army in a glorious battle in a trinary star system. The three warriors forced the enemy to fight with the blinding light of three suns in their eyes. The battle ended with the mountainside covered with so many dead that there was not a square meter of ground to be seen. They together feasted on T'nag's heart in celebration of their victory. (DS9: "The Sword of Kahless", "Once More Unto the Breach")
In 2293, Kang encountered Captain Sulu, of the USS Excelsior, in the Azure Nebula as Sulu attempted a foray into Klingon space. To evade Kang, Sulu ignited the volatile sirillium gas inside the nebula disabling Kang's battle cruiser ensuring their escape. (VOY: "Flashback")
Kang commanded many ships in his career. In 2372, Kang's friend, Kor had a dream about discovering the Sword of Kahless. In the dream, the statues of Kang and Koloth in the Hall of Heroes would turn to flesh and blood, as the trio presented the Sword to Emperor Kahless. Kang's ship then uncloaked above, and a swirl of song transported the trio into its embrace and the ship streaked away into the golden light to the gates of Sto-vo-kor. (DS9: "The Sword of Kahless")
During the late 2280s, a band of depredators, led by the Albino, began raiding Klingon colonies. Three Klingon warships, commanded by Kang, Koloth and Kor, were sent out to stop him. Their mission was successful in capturing most of the depredators, however, the Albino was able to escape. In the Albino's last message to the Klingons, he promised to take his revenge on the firstborn of each of the three captains. Within a few years, the Albino kept his word and he managed to infect the warriors' three innocent children with a genetic virus that eventually killed them. (DS9: "Blood Oath")
The blood oath
In 2290, Kor, Kang, Koloth and Curzon Dax pledged a blood oath to avenge the deaths of their sons, the offense committed by the Albino. They nearly caught the Albino at Galdonterre, but one of their subspace messages was intercepted and he, once again, was able to escape.
In 2363, after decades of searching, Kang discovered one of the Albino's discarded wives on Dayos IV. Kang fed and clothed her and later told her the story of his murdered son and his quest for the Albino. Although she said nothing of the Albino's location, Kang suspected that she knew where he was.
In early 2370, Kang received an amulet, sent to him through the recently deceased former wife of the Albino. The amulet revealed to Kang the whereabouts of the Albino, who had a compound located on Secarus IV. Kang traveled to the Secarus system to confirm the revelation, only to be immediately contacted by the Albino, who, unexpectedly, invited the trio to a "fair fight" and one last glorious battle - forty of the Albino's best warriors against his four pursuers. Not expecting victory, but willing to settle for an honorable death in battle, Kang accepted
Three months later, the Klingons assembled at Deep Space 9, where Dax's then-current host Lieutenant Jadzia was assigned. Kang informed the others of the Albino's location but not of what happened when he gone there. Kang objected to Jadzia's inclusion, believing she was not bound by Curzon's blood oath. Though she convinced Kor and Koloth to support her, Kang continued to resist until he reluctantly relented. En route to Secarus, Dax pressed Kang on the matter until he finally admitted the truth to her and eventually the others. It was later discovered that the Albino had never had any intention of honoring his word and had laid a trap by planting a gravitic mine at the threshold of his compound. Dax suggested using the Albino's expectations to their advantage and plan a new strategy.
Using the element of surprise, they bombarded the compound with tetryon particles, rending any energy-based weapons useless, and forcing the Albino and his sentries into face-to-face, hand-to-hand combat. Koloth was fatally wounded fighting the Albino's personal guard. Kang's bat'leth was shattered during a fierce battle with the Albino and Kang was mortally wounded. However Kang managed to kill the Albino (held at bay by Dax) by stabbing him in the heart with a d'k tahg before he died as well. Having fulfilled their blood oath, both Kang and Koloth died glorious and honorable deaths. (DS9: "Blood Oath")
Kang was played by actor Michael Ansara in all of his appearances.