* * * * * * * * * * Back ___________
StarFleet Intelligence 
Klingon History

Little is known of the Klingons before the establishment of the Empire. Klingons, being a prideful race with a closed society, are averse to sharing their secrets. Being seen as violent, belligerent, and anti-intellectual, it is hard to imagine that the Klingons developed their high level of technology and science (including warp drive) by themselves. However, the Klingons do have various castes such as the scientist caste that show that the Klingons are capable of doing their own research. Klingon religion also states that the first Klingons destroyed the gods (masters) who created them. Klingon physiology with its redundancies and great strength is also ideal for military operations. The combination of these characteristics suggests they have origins as a vassal race.

1st Millennium

The Klingon Empire was founded circa 900 AD on the Klingon homeworld of Qo'noS by Kahless the Unforgettable when he slew his tyrant brother, Molor.

The Empire went through several dynasties of rulers, experiencing a period between the 2nd and 3rd known as the "Dark Time", a 10-year experiment in democracy.

Around the 14th century, Qo'noS was invaded by the Hur'q, who pillaged many treasures, including the sword of Kahless.

The Klingons eventually expelled the Hur'q, which is the Klingon word for "outsider", from their homeworld. It is likely the Klingons stole the invaders' technology, including their warp drive and weapons systems, and used them to expand their empire into space. If Klingon designs were in fact stolen, and not developed on their own, this might explain why Klingon technology seems to advance so little during the ensuing centuries compared to other planets, such as Earth. It also explains how such a warlike and anti-intellectual civilization was able to develop warp drive, in that they reverse engineered it from the technology of an invading race. By 2069 the High Council was formed, eliminating the position of Emperor until 2369.

22nd century

Around the early part of the 22nd century, the warrior class began exerting a greater influence throughout Klingon society, radically altering, notably, the justice system.

In 2151, a faction in the Temporal Cold War from the 28th century attempted to alter the timeline by using the Suliban Cabal to incite unrest within the Klingon Empire. This resulted in the first contact between Klingons and Humans and sparked the first voyage of the Warp 5 vessel, Enterprise. Concurrent with this mission, Enterprise communications officer Hoshi Sato became the first known human to learn the Klingon language. Although initially positive, the relationship between Starfleet and the Klingon Empire remained on shaky ground during the first few years of contact, with Enterprise being fired upon by a Klingon battle cruiser only a few weeks after the vessel's trip to the Klingon homeworld  By 2152-53, Captain Jonathan Archer had become a fugitive from Klingon justice, and at one point Enterprise destroyed a Klingon vessel carrying the then-head of the House of Duras who was pursuing the fugitive. The long-term fallout from this has yet to be revealed in canon, although the crew of Enterprise redeemed themselves somewhat in 2154 by helping the Empire stop the Augment Virus from becoming fatal.

23rd century

Around 2218, relations between the Empire and the Federation degenerated substantially, with intense hostility lasting until 2293.

In 2266, war between the Federation and Klingon Empire is stopped before it can begin by the interference of the Organians. The Organian Peace Treaty forced on both sides holds each to a non-aggression pact and an establishment of a neutral zone in which each side must nonviolently compete for trade agreements with any planets.

In 2267 the Klingons and the Romulans forged a military alliance and the Klingons traded several D7 battlecruisers in exchange for cloaking technology. 

In 2293 the atmosphere of Qo'noS was contaminated when Praxis, one of its moons, and its primary mining facility, exploded. This event was a turning point in relations between the Klingons and the United Federation of Planets, as the Klingon Empire could not afford to maintain their excessive military activities and deal with this new problem. Thus the two entered into an alliance which was maintained for many years until it was suspended for a couple of years after 2372 owing to the issue of the Cardassian invasion.

24th century

In 2342 the Klingons and Romulans began a violent war after the Romulans attacked the Klingon outpost Narendra III. The Enterprise-C cemented friendly relations between the Klingon Empire and the Federation by sacrificing itself to protect the outpost from the Romulans.

In 2357, Worf , Son of Mogh, a survivor of the Khitomer massacre, became the first Klingon to enter Starfleet Academy and in 2364 he was assigned to the Enterprise-D as relief conn and tactical officer.

In 2367 the Klingon Civil War began after Chancellor K'mpec was murdered. Before his murder, K'mpec had named Captain Jean-Luc Picard his Arbiter of Succession. Gowron was selected, but the House of Duras opposed this decision and the war began. It was later revealed that the Romulans were backing Duras and Duras quickly lost all support, ending the war and leaving Gowron as undisputed leader of the empire.

In 2369, the position of Emperor was reinstated, when the clone of Kahless inherited the throne with the blessing of the Chancellor and High Council. Titled Kahless II, the emperor became titular ruler of the empire at a time when the empire needed a figurehead. The bulk of power, however, remained in the hands of the High Council.

In 2372, relations between the Klingons and the Federation soured over the issue of the Klingon invasion of Cardassia. When the Federation refused to support the Klingon invasion, Chancellor Gowron withdrew from the Khitomer Accords. For the next year, relations between the two powers were hostile. In 2373 fighting broke out between the two powers. However when the Federation and Klingons discovered that they were being manipulated by the Dominion, an uneasy cease-fire was declared. In mid-2373, the Cardassians formally announced they had joined the Dominion, and the Jem 'Hadar rapidly forced the Klingons to retreat from Cardassian space, inflicting heavy damage on them. Captain Sisko was able to convince Gowron to reinstate the Alliance.

Again allies, the Klingons and Federation turned their attention to the Dominion and the Cardassians as war against them became inevitable.

When the war began, both the Federation and Klingons fought side-by-side against the Dominion, even though the odds were against them. However, once the Romulans joined them the tide eventually turned against the Dominion. In 2375 the Federation-Romulan-Klingon fleet defeated the Dominion with the assistance of the Cardassian fleet during a final assault on Cardassia Prime. Despite the refusal of Sisko and Ross to drink bloodwine with Martok in the Cardassian Central Command, the two powers remained strong allies after the war.

Shortly before the end of the Dominion War, in 2375, Gowron took direct control of the Klingon fleet (a position held up until that point by the successful General Martok) because he was concerned that Martok was becoming too popular among both the troops and the civilian population from his wartime success. Since new Chancellors can ascend to that position by killing the former Chancellor, Gowron feared that Martok would challenge him for his position. Since Gowron was much more of a politician than a general, the Klingon fleet began to take unnecessary losses that Gowron manipulated to appear to be the fault of Martok. Commander Worf, disgusted with Gowron for using bad tactics in the war simply to hurt Martok's political position, challenged the Chancellor in a meeting to ritual combat and defeated him (killing Gowron in the process). By the traditions of the Empire, Worf had the right to become the next Chancellor if he wished, but instead granted the role to Martok, having no desire for a political position himself, although Martok would shortly thereafter have Worf become the UFP's ambassador to the Klingon Empire. Ironically, Martok never had any designs on Gowron or his position, even accepting the unpopular position in which Gowron had placed him without questioning his orders.