The Trade Union was a very powerful commerce guild, trade cartel, megacorporation, and lobbying group that was founded in 123 BBY as an association of business and trade groups with its own Fleet.
The Federation grew to dominate entire star systems and all major trade routes, and possessed a formidable private military. Toward the end of the Republic, it would become increasingly dominated by the commerce-savvy Clawdites.
The Federation played a major role in the Holdout-Imperial War for its allegiance to the Holdouts. It was dissolved after the Leftover at Zolan