The Taurian Concordat is an interstellar nation in the fictional BattleTech universe. It is the largest of the Periphery powers. It is characterized by a mild xenophobia, a paranoia concerning House Davion, peaceful foreign affairs, and a strong industrial base. Its people are freedom loving, and have in the past been noted for their fanatical defense of the Concordat.
The Taurian Concordat was founded in 2253 by settlers fleeing the Terran Hegemony. They entered the resource-rich and easily defensible Hyades Nebula, which forms the nucleus of the modern day Taurian Concordat. The leader of the settlers was named Samantha Calderon, who became Protector (Monarch) of the newly formed Taurian Concordat. It fought border wars with House Davion and House Liao during the Age of War.
In 2573 a squadron of Taurian warships misjumped into the Pollux system that was being jointly administered by the Taurian Concordat and the Federated Suns. The Federated Suns destroyed the Squadron. The misjump led to the passing of the Pollux Resolution, which would bring the Periphery states "despite their reluctance, for the good of all," into the Star League. What began as a 6-month campaign ended in the 19-year Reunification War.
The Reunification War was a bloody struggle for supremacy. The "Taurians" fought tooth and nail, using weapons of mass destruction. The war finally ended when the Star League finally pierced the Hyades Nebula, and the last remnants of the Taurian Concordat Surrendered. The war ended in 2596.
The Taurian Concordat's military is called the Taurian Defence Force. It is made up of seven corps and four fleets. All citizens in the Concordat are required to serve a 2-year term with the TDF following their 18th birthday. Major military actions that they were involved in are: various (unamed) battles during the Age of War, the Reunification War, the Vandenburg Revolt, the St. Ives War, and the Pleadies War.
Recently, in the years leading up to the Word of Blake Jihad, the Taurian Concordat has splintered into two realms: One named after the original, and the other calling itself the Calderon Protectorate.