Storming Amargosa - Expanded Edition. Amargosa Trilogy, #3

The Storm breaks on Amargosa. Davra Andraste returns to the resistance with her former captor as her prisoner. Now she will have to confront an even more implacable enemy, the human warlord Colonel Kray. Laral Farad assumes rule over occupied Amargosa after the deaths of his uncle and cousin. He intends to exterminate the humans once and for all. But a new resistance rises, made up of humans, his own people, an intelligence no one knew existed before, and their leader, a teenage girl on a mission of vengeance.
JT Austin has gone from runaway to combat pilot. On Hanar, he trains with a sword-wielding special forces lieutenant and friendly Gelt to keep a promise to his late wife. He's going to take back Amargosa. Or die trying. Marcus Leitman sees five centuries of work nearing its end. But he must walk a tightrope in the halls of power, letting someone else take the mantle of leadership while he manipulates events behind the scenes.
Only his nemesis of four hundred years returns to tell him he's about to fail. Amargosa has groaned under Gelt occupation for a year. In one swift strike, humans will take back the planet. And both human and Gelt will be irrevocably changed.