The Theogony3 books in series
Janissaries: The Theogony, Book 1 Publisher's Summary
The war with China was over and Lieutenant Shawn "Calvin" Hobbs just wanted his life to go back to normal. The hero of the war, he had a small ream of paperwork to fill out, a deployment with his Navy F-18 squadron to prepare for, and a new girlfriend to spend some quality time with. Life was good. Until the aliens showed up. They had a ship and needed to get to their home planet, but didn't have a crew. They had seen Calvin's unit in action during the war, though, and knew it was the right one for the job. There was just one small problem - a second race of aliens was coming, which would end all life on Earth. Calvin's platoon might want to do something about that, too. Having already won a terrestrial war with 30 troops, winning an interstellar war with nothing but a 3,000 year old cruiser should be easy, right?
Janissaries initiates The Theogony, a trilogy that takes Lieutenant Hobbs and his Special Forces platoon to the stars where they will learn that there's much more to Earth's history than is written in the history books!