Klingon

The Klingons were a humanoid warrior species that originated from the planet Qo'noS (pronounced Kronos), an M-class planet in the Beta Quadrant. One of the major powers of the galaxy, the Klingons were a proud, tradition-bound people who valued honor and combat. The aggressive Klingon culture had made them an interstellar military power to be respected and feared. Source: Memory Alpha

History

In 2376, a coup against Chancellor Martok was designed to throw the Klingon Empire into chaos and allow the two Klingons Morjod and Gothmara to become the new rulers of the Klingon people. This coup against Martok was ultimately unsuccessful, and Morjod and Gothmara were killed. Instead, the alliance with the Federation continued to prosper. In 2379 the two worked together in the construction of the Unity One station. The Unity base was an advanced starbase, representing the accomplishments of the alliance. As part of the design, the station's sophisticated sensor array allowed it to detect even cloaked vessels that were many sectors away.

In 2380, as the Romulan Civil War raged in full, Chancellor Martok accepted the Remans as a protectorate of the Klingon Empire, resulting in Klingon vessels entering Romulan space. Through the year, Klingon forces were involved in a number of skirmishes within Romulan space. After continued attacks and the failure of the Remans to successfully settle on the Ehrei'fvil continent of Romulus, the Klingons allowed the Remans to settle on a planet within the Klingon Empire.

Later in 2380, Chancellor Martok attended a conference with the Federation President and the Romulan Praetor regarding the founding of the Imperial Romulan State. Rather than denounce the new government of Commander Donatra, now Empress of the Imperial Romulan State, Martok instead gave his approval to the new state, recognizing its sovereignty.