The Draconis Combine is one of the Successor States, located in the "north-east" quadrant of the Inner Sphere. The Combine is ruled by the Coordinator, the head of House Kurita. His court is located on Luthien. The Draconis Combine has been ruled by House Kurita since its founding in 2319 by Shiro Kurita, perhaps a descendant of Takeo Kurita, a Vice-Admiral in the Imperial Japanese Navy during World War II on Terra.
The Coordinator is a hereditary dictator, who rules over his domain armed with a well-equipped, fanatical military and an ever-pervasive, all-seeing civilian bureaucracy. Two rival intelligence agencies, the ISF (Internal Security Force) and the O5P (Order of Five Pillars) keep watch against any potential internal threat from commoners, ambitious nobles, and members of the Coordinator's own family. (However, the physical protection of the Coordinator falls to his own personal cohorts, who are recruited from the military, not the intelligence services).
The idée fixe of the Combine and the Coordinator is conquest. The Combine employs a large, skilled military, the Draconis Combine Mustered Soldiery, that has often been used to expand the realm at the expense of its neighbors.