Gateways (Bk.6) (Star Trek - New Frontier - Gateways) by David, Peter Paperback

Scattered throughout the galaxy are Gateways which link star systems across unfathomable distances. Awakened once more, their ancient Gateways are rewriting the map of the galaxy, and nowhere more than in the New Frontier.A century ago, the imperial Thallonians separated two feuding alien races, depositing each of them on a new world safely distant from that of their ancestral enemies.