Klingon Empire

Facts

Early 21st century: Start of the Vulcan-Klingon War upon first contact with the Confederacy of Vulcan, continuing through the mid-21st century (ENT Novel: A Choice of Futures; DIS: "The Vulcan Hello"; TNG: "First Contact")
Mid-22nd century: Entered period of consolidation to resolve internal political conflicts (ENT Novel: To Brave the Storm)
May 11, 2156: Protracted eight-month war with Federation begun following consolidation of Great Houses under a single direction (DIS)
March 22, 2267: Opening volleys of a second war begun, averted only by intervention of Organians and the forced institution of the Organian Peace Treaty (TOS: "Errand of Mercy")
2293: Opened diplomatic talks with Federation following destruction of Praxis threatening the ability of Qo'noS to sustain life (Star Trek VI: The Undiscovered Country)
- Talks result in the drafting of the Khitomer Accords, which by the 24th century becomes the foundational document for a broad alliance amongst Alpha and Beta Quadrant powers

Klingon Defense Force serves as military body
Head of State: Chancellor
- Leader of the High Council
  - Body composed of representatives of the noble houses of the Empire
- Klingon Chancellors