The Swift War
Incomplete Klingon records of this time suggest that the members of the Imperial race of rulers may have been collaborating with the Romulan Empire and fomenting a war. In any case, the Swift war began in 2289. There were many reasons for the outbreak of this war. Klingon excursions and violations against the neutral zone brought had brought Federation retaliation. The Klingon Imperial race would not have admitted to the people that they were, in fact, the ones breaking the treaty and they claimed that the Federation was breaking the treaty and trying to take over the Empire. The Imperial Klingons promised full support of their Ambassador to the Federation's vow in 2286 that "there shall be no peace as long as [Captain James T.] Kirk [of the USS Enterprise] lives!" The rulers also twisted the words of Kang the Seer and Kahless and used them to support their argument in favor of war because they said the Federation was trying to dictate Klingon policy. In truth, the Federation had expressed deep concern, bordering on a violation of their Prime Directive, regarding the purging of the nonImperial race.
Regardless of the various causes, the Swift War broke out in 2289. There were many reasons for it's rapidity. One, the seemingly expected Romulan help didn't materialize. Quite possibly, given the apparent Romulan psyche, they were letting the two superpowers fight it out while they sat back and waited to pick up the pieces. Another cause for the rapid end was stubborn Klingon pride. Since one of the reasons for the war was the declaration that Kirk should die, every Klingon considered it the greatest mark of honor if he could be the one to kill Kirk. Despite their trained obedience, many Klingons found themselves disregarding orders when they were in the vicinity of Kirk, hoping for that glorious kill. Unfortunately, the glorious kill was always their death, for Kirk was always quite disciplined when on the bridge of his ship and his cunning was enough to almost qualify him, a human, for the Jha Jook. Even the Emperor was swayed by this pride. Records show that he sent the T'ong, a sleeper ship, out in 2290. The plan was for this ship be scanned as floating space debris and to be ignored. Then the crew would awaken in a year and to attack Kirk from within his own boundaries. Unfortunately, the controls malfunctioned and the ship was not discovered until 2365, ironically, by the USS Enterprise, under the command of Jean-Luc Picard. Of course, the Klingons would not have believe it if a human told them they were not still at war, so Captain Picard had his Klingon security officer play the role of captain and order the crew of the T'ong home.
But the reason given the most credence for the rapidity of the Swift War was the changing attitudes of the Klingon people. Many people who had formerly supported the Imperial race grew disenchanted when the realized the extent of the purging. They feared for their own lives, since the Imperial race was still a minority. They were quite a gifted and talented minority, but a minority nonetheless. Most of the population of Klinzai was of nonImperial stock. These people found in the writings of Kang the Seer, Kahless, and Kang the Merciful the guidance that it took to turn their world around. They began strikes and riots in all the major cities on Klinzai in 2290. By 2291, the Imperial race realized that it couldn't fight a war on two fronts -- in space and at home. They ended the Swift War with the Federation and turned their attention to the problems at home. By this time, however, it was too late. The leaders of the Imperial race were quickly executed. The rank and file, however, were absorbed into the general population upon swearing a vow to follow the teachings of Kang.
There was one factor in which the Imperial race was quite superior, though -- genetically. Within five generations the superior genetics of the Imperial race had filtered its way into the majority of the general population. The purges were never considered again because it had become simply too impossible to tell who was Imperial and who was not. During this time, the people turned more and more to the writings of Kang. Many still gave only lip service, but it was gaining more real appeal with the general population.