Die Letzte Kolonie by John Scalzi

A seasoned former soldier and his partner are assigned to lead a small, hastily gathered group of settlers to found a distant human colony, only to discover their mission is a political setup that draws them into interstellar manipulation, alien diplomacy, and outright conflict; forced to protect their people and make wrenching choices about leadership, loyalty, and the right to self-determination, they must navigate moral dilemmas, espionage, and unexpected alliances as they try to build a home in a hostile and politically treacherous universe.