In StarCraft II, what is the name of the Terran government founded by Arcturus Mengsk?

In StarCraft II, Arcturus Mengsk rules the Terran Dominion.

The Terran Dominion is founded after Mengsk’s Sons of Korhal overthrow the Terran Confederacy. Mengsk presents himself as emperor and replaces the old Confederate government with a centralized regime that controls much of the Koprulu sector.

The Dominion is the main Terran political power in StarCraft II. Its forces include the familiar Terran military technology of the series, while its propaganda and authoritarian leadership create continuing conflict with Jim Raynor and other opponents.

The Terran Confederacy is the government that precedes the Dominion. The United Earth Directorate is an expeditionary authority from Earth introduced in Brood War, and Raynor’s Raiders is a rebel organization rather than a government. The exact title matters because several Terran powers coexist in the wider story.