Excelsior (New Frontiers Trilogy, #1)

The lines are drawn, with the Confederacy in the East, and the First World Alliance in the West. In hopes of finding a refuge from the looming war, the Alliance is sending Captain Alexander de Leon to explore an Earth-type planet, code-named Wonderland, but at the last minute before launch, a Confederate fleet leaves orbit on a trajectory that threatens both the mission and Alliance sovereignty. The resulting power struggle will determine not only the fate of Alexander's mission, but the fate of the entire human race.