Deliverance

The war is over. Earth is lost. Running is the only option. And it may already be too late.
Caleb is a former Marine Raider and commander of the Vultures, a search and rescue team that's spent the last two years pulling high-value targets out of alien-ravaged cities and shipping them off-world.
When his new orders call for him to join 40,000 survivors aboard the last starship out, he thinks his days of fighting are over. The Deliverance represents a fresh start and a chance to leave the war behind for good.
Except the war won't be as easy to escape as he thought.
And the colony will need a man like Caleb more than he ever imagined.
Enter the universe of the Forgotten with Deliverance, the first book in the Forgotten Colony series. If you're a fan of Aliens, _Battlestar Galactica, Starship Troopers, Ender's Game, or Edge of Tomorrow, you'll love this epic military sci-fi thriller.