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"Kahless left us, all of us, a powerful legacy. A way of thinking and acting that makes us Klingon."
Kahless (clone), 2369 ("Rightful Heir")

Kahless the Unforgettable (Klingonese: qeylIS) was a legendary mytho-historical Klingon figure. He was the first Warrior King and Emperor of the Klingon Empire, known as the "greatest warrior of them all".

Kahless was the last Klingon to unite all tribes until the Federation-Klingon War of 2256, which was started with that purpose by a Klingon called T'Kuvma, who was concerned that his race had begun to "forget the Unforgettable". (DIS: "The Vulcan Hello")

Time crystals were a symbol of Kahless. (DIS: "Through the Valley of Shadows") Kahless' battle cry, "Today is a good day to die", continued to be a popular Klingon utterance into the 24th century, including in the simpler form "It is a good day to die." (VOY: "Dragon's Teeth"; DS9: "Blood Oath", "The Way of the Warrior")

Quick Answers

Who was the first Warrior King and Emperor of the Klingon Empire? toggle section
The first Warrior King and Emperor of the Klingon Empire was Kahless the Unforgettable. He founded the Klingon First Empire and established the position of Emperor after his victory over the tyrant Molor and the Fek'Ihri. The emperors were part of a dynasty descending from Kahless, with the final emperor's reign concluding in the mid-21st century.
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What was the significance of time crystals to Kahless the Unforgettable? toggle section
Time crystals, also known as poH qut in Klingonese, were a symbol of Kahless the Unforgettable. Guarded by the Timekeepers, a group within the Followers of Kahless, these rare minerals were housed in the Boreth monastery. To many Klingons, time crystals were a myth, symbolizing Kahless and the namesake of Qo'noS. Despite their mythical status, these crystals, native to Boreth, were occasionally encountered.
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Who was the last Klingon to unite all tribes before the Federation-Klingon War of 2256? toggle section
The last Klingon to unite all tribes prior to the Federation-Klingon War of 2256 was Kahless the Unforgettable. The unity was disrupted by T'Kuvma, a Klingon who started the war to reunite the tribes. Kahless' influence persisted, with his battle cry remaining a popular Klingon saying into the 24th century.
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Who started the Federation-Klingon War of 2256 and why? toggle section
The Klingons instigated the Federation-Klingon War of 2256 as part of a strategic plan to provoke a conflict with the Federation. This significant Alpha Quadrant conflict concluded with a cease fire and the ascension of L'Rell to the leadership of the Klingon Empire.
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History

Sometime in the 9th century, Kahless united the Great Houses defeated his enemies, including Molor and the Fek'Ihri, on the field of battle and founded the mighty Klingon Empire, uniting the Klingon people and giving them the laws of honor. Kahless conquered Qo'noS from Molor which would become the Klingon homeworld. Upon his death, Kahless promised he would return one day and lead the Empire again. After his death, it was said that Kahless awaited all Klingons in Sto-vo-kor: the life which lies beyond this life. His teachings of honor and tradition formed the basis of modern Klingon philosophy and culture. As of 2374, Kahless was still revered as a near-divine figure by the Klingons. (VOY: "Day of Honor"; SA: "Vox In Excelso")

Although Kahless was not high-born, those who descended from him and his wife, the Lady Lukara, were said to reside within the Klingon Imperial Court. Those members of the Court, including Dahar master Kor, were considered "of the blood," and were regarded throughout the Empire to have been born to rule by the divine will of Kahless. (DS9: "Tacking Into the Wind", "Once More Unto the Breach")

In 2256, the zealot T'Kuvma proclaimed that the Great Houses of the Klingon Empire would "stand as one under Kahless, reborn in me, T'Kuvma." (DIS: "Battle at the Binary Stars")

Excalbian's recreation of Kahless

Excalbian's recreation of Kahless

In 2269, an image of Kahless was created by the Excalbians in a plot devised to better understand the concepts of "good" and "evil". The image was considerably flawed from the original Kahless, with such notable discrepancies as being infected with the Klingon augment virus and wearing a 23rd century Imperial Klingon Fleet uniform. The Excalbian version of Kahless appeared and acted quite differently from the original, since the image had been created from reading the minds of Humans who, at that point in Starfleet history, saw Kahless as a ruthless tyrant, and had had far more contact with Augment Klingons (or their descendants) than with standard Klingons. The Excalbian version of Kahless also had a talent for mimicking voices. (TOS: "The Savage Curtain")

In an early draft of TNG: "Rightful Heir", Data gave the exact date of Kahless' death as 1,547 years ago (from 2369), or AD 822. According to DS9: "Soldiers of the Empire", the Earth calendar year of 2373 coincided with the year of Kahless 999.

Legacy

The stories of Kahless were the stories of the Klingon people. Passed down from generation to generation, these stories reminded the Klingons about who they were and where they had come from. Klingons studied these stories for all of their lives; Worf said he found new truths in them on each reading. (TNG: "Birthright, Part II") Many of these stories were held within the sacred texts, a few exclusively. Nevertheless, they remained an integral part of Klingon lore.

The following stories are portions and excerpts of song and lore surrounding the life of Kahless:

Kahless and Morath fight

Kahless and Morath fight

Kor and Worf find the Sword of Kahless

Kor and Worf find the Sword of Kahless

The Shroud of the Sword

The Shroud of the Sword

The Knife of Kirom stained with the blood of Kahless

The Knife of Kirom stained with the blood of Kahless

From the "drinking song":

A small shrine with a statue of Kahless

A small shrine with a statue of Kahless

The story of the sword was known only by the Klingon High Clerics, because it was never written down in the sacred texts. This was so that, if Kahless was ever to return, they could be sure it was him. (TNG: "Rightful Heir") When the Shroud of the Sword of Kahless was discovered, it was determined that the Sword of Kahless dated back at least 1,400 years. (DS9: "The Sword of Kahless")

Molor's defeat was celebrated annually with the observance of the Kot'baval Festival. (TNG: "Firstborn")

The wielding of Ma'Stakas, used to re-enact Kahless' and Lukara's battle at Qam-Chee, at the conclusion of a Klingon wedding was a continued tradition in Klingon culture.

In "Looking for par'Mach in All the Wrong Places", which takes place in 2373, Worf enthusiastically mentions the events in Qam-Chee to have happened "a thousand years ago." However, this statement contradicts TNG: "Rightful Heir" and TNG: "Firstborn", which both state that Lukara and Kahless lived five hundred years earlier.

Another story that mentions Kahless entering the afterlife said that he was there to rescue his brother from the Barge of the Dead and deliver him to Sto-Vo-Kor. According to the Eleventh Tome of Klavek, Kahless returned from the dead still bearing a wound from the afterlife. (VOY: "Barge of the Dead")

The Story of the Promise was Kahless' swan song, "When Kahless united the people and gave them the laws of honor, he saw that his work was done. So one night he gathered his belongings and went to the edge of the city to say goodbye. The people wept, as they did not want him to go. And Kahless said, "You are Klingons. You need no one but yourselves. I will go now, to Sto-Vo-Kor. But I promise one day I will return." Then Kahless pointed to a star in the sky and said, "Look for me there, on that point of light."

In an early draft of "Rightful Heir", Data gave the exact date of Kahless' death, in 2369, as 1,547 years ago or AD 822. According to "Soldiers of the Empire", the Earth calendar year of 2373 coincided with the year of Kahless 999.

The story of "The Promise" indicated that Kahless was to reappear in the lava caves on the planet of Boreth. The Followers of Kahless, or Guardians, waited there for his return. To Klingons, there was no more sacred place. For over 1,500 years, Klingons came to Boreth to ask questions. According to the clerics, the only way a Klingon warrior could find the answers they sought was to "Open your heart to Kahless, ask him your questions, let him speak to you with your mind unclouded by doubt or hesitation. Only then can you find what you are looking for." (TNG: "Rightful Heir")

After witnessing Worf's prowess in battle against the Jem'Hadar, General Martok praised his fellow Klingon, noting that Worf "truly [had] the spirit of Kahless within [him]". (DS9: "By Inferno's Light")

Caleb Mir told Jay-Den Kraag that he had heard the story of how Kahless had conquered Qo'noS, the Klingon homeworld, from Molor and how "they ate entrails stew to taste their victory, and how Kahless' warriors laid their weapons at his feet to honor him." The SuvwI' tlhIq continues to commemorate the event. Jay-Den revealed that his parents had sung Jay-Den and his brother Thar to sleep with that myth and it gave them comfort in the refugee camps. After finally understanding the myth, Jay-Den suggested to Starfleet that, instead of giving Faan Alpha to Klingons as their homeworld (which they refused as charity), "fight" the Klingons and allow the Klingons "conquer" the planet, as Kahless had done with Qo'noS. (SA: "Vox In Excelso")

Artifacts

See also

Quotations

The second last quote is a variation on a line from Shakespeare's Twelfth Night: "Be not afraid of greatness: some are born great, some achieve greatness, and some have greatness thrust upon them." This parallel may explain Chang's claim that the Bard was originally written in Klingon.
In a deleted scene from "Tacking Into the Wind", Ezri Dax quoted Kahless as saying, "A leader is judged not by the length of his reign but by the decisions he makes." [1]

The Rightful Heir

A clone of Kahless

A clone of Kahless

See: Kahless (clone)

Appendices

Further references

Background information

The "real" Kahless never appeared on Star Trek, outside a painting of his depiction as portrayed by Kevin Conway, who also appeared in "Rightful Heir" as Kahless' clone. The original depiction, and introduction of Kahless, appeared as an Excalbian recreation in "The Savage Curtain", who was portrayed by Robert Herron.

The name "Kahless" has been pronounced in various ways throughout Star Trek, such as the commonly used "Kay-less" and "Kaw-less" by Worf in "New Ground". The Okrandian Klingon language spelling of his name was qeylIS. (The Klingon Dictionary 2nd ed., p. 58)

Among the inspirations for Kahless as portrayed in TNG were King Arthur, Jesus Christ, and Viking lore. (AOL chat, 1998)

The original script for "Birthright, Part II" included a number of additional tales about Kahless that were not included in the final version of the episode (some of these unaired tales were later contradicted by other episodes):

In the first draft script of DS9: "When It Rains...", Kahless was said to have stood before his warriors, cut his own hand with a knife so that blood dripped out of his palm, and instructed those present, "Do this… in memory of me."

Kahless' lifetime

The exact time period in which Kahless lived has repeatedly been described with differing numbers. In "Looking for par'Mach in All the Wrong Places", taking place in 2373, Worf enthusiastically mentions Kahless' battle against Molor's troops to have happened "a thousand years ago." This would appear to be somewhat of a contradiction, as TNG: "Rightful Heir" states that the monks on Boreth have been awaiting Kahless' return for fifteen centuries, i.e. five hundred years longer. Either Worf "rounded" the number of years in his enthusiasm, or Molor and Kahless were at least five hundred years old, which, while the maximum life span for Klingons has never been clearly defined, seems to be without precedent. Another solution would be that Worf counted in Klingon years, as DS9: "Soldiers of the Empire" established 2373 to correspond to the Year of Kahless 999. This would also be in accord with the Sword of Kahless being dated to an age of 1,400 years in "The Sword of Kahless". Furthermore, a scene cut from "Rightful Heir" had Data specify Kahless' death as 1,547 years prior, which would place it in 822 AD.

Apocrypha

The novel Kahless showed a different take on the legend. The novel asserted that Kahless, son of Kanjis was a soldier within Molor's army who refused to burn down a village and who was forced to slay Molor's eldest son. This turned Kahless and his band into outlaws, but their goal was not to topple Molor but to simply hide. Rumors spread, however, that they planned to overthrow Molor's tyrannical empire. After the death of his love, a woman known as Kellein, Kahless despaired and fled the group, but was followed by his loyal friend Morath, son of Ondagh, who wrestled with Kahless for six days and nights. After this wrestling match, Kahless yielded to Morath and dedicated his life to destroying Molor. The novel also mentioned the Mok'bara; in the novel, Kahless had never heard of the practice. The book also suggested that the blood used to create the clone of Kahless was not Kahless' blood but rather Morath's.

The comic book Star Trek: Klingons also uses the name Kahless, son of Kanjis but is otherwise much more true to the legend of Kahless as a messianic figure. The story begins with Kahless slaying his brother Morath and continues with Kahless defeating the armies of the three warlords of Three Turn Bridge and freeing the people from their tyranny. In this story, Molor had a spaceship and was worshiped by some Klingons as a deity.

In the FASA role-playing game, Kahless lived during a time when Klingons had already invented warp drive and died fighting against the Romulans. His full name was Kahless epetai-Riskadh.

In the DC Comics line, a descendant of Kahless, Kahless IV, served as emperor during the movie era. This conflicted not only the details of "Rightful Heir", but also a statement that the Klingons had not had an emperor in three hundred years.

In Star Trek Online, the clone of Kahless seen in TNG and DS9 appeared prominently in early missions available to Klingon players, and fought alongside them battling Fek'Ihri forces intent on conquering the Klingon Empire. He later was killed in single combat against an Iconian named T'Ket during The Iconian War.

In the miniseries Star Trek: Prey, a group of con artists fake the public execution of the Kahless clone with the goal of studying him so that they can attempt to fake the return of the true Kahless, but Kahless is able to outsmart them and escape captivity, and the plan is brought to a halt when the gang betrays each other before they can put it into practice.

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