The Lion Alliance, also known as the Dominion Alliance, was formed following the Iconian War of 2412 by the Cardassian Union, the Britannian Empire, the Dominion, the Romulan Star Empire, the Peace Keepers and the Terran Empire. The alliance was founded on dictatorship and controlling the masses, which led to many ongoing rebellions. The Alliance was controlled by a Kelvan named XZodd.
The Lion Alliance military was made up of genetically engineered solders, such as Unisols and Jem'Hadar. However, some were responsible for the conspiracy that drove both the Eagle and the Dragon Alliances to be at war.