The Terran Accord was a corporate state. It pretended to be a representative democracy but instead was an oligarchical fascist empire, run by a few rich quadrillionaires like the Altair family. It controlled roughly 200 systems (though the Affini Compact has found their record keeping very very lacking) and had a radius of about 500 light years around the Sol System.
The Terran accord also had conquered the Rinans and committed atrocities against them while also exploiting them for capitalist gains. Terran Supremacy (xenophobic racism) existed in the upper echelons of both the government and navy.
The Accord had forge worlds that were just planetary sweatshops. The Accord left earth a barely hospitable planet where almost all of it was just slums outside of the poles. The wealthy elite are literally above the law in the Accord. They live in their personal paradises built on the backs of an exploited workforce.
The Accord is run by a president that maintains the status quo for the corporations that placed them in office.
The Linden company was a media empire of procedurally generated media content and even established a resort world on Xenia. (See Nurture & Acquisitions)
Helion Inc. was military contractor that preformed illegal human experimentation. (See Unit 7.322 (aka Tess))
IRC, the Interstellar Resource Conglomerate. Unknown purpose. (See Morning Bloom)
Terra Medical. Pharmaceutical company on earth. (See Morning Bloom)