Hell's Own: System Wars: Frontier Wars Book 1 in Bloomington, MN

First Contact, an event dreamed of by the people of Earth since they first realized they might not be alone in the universe. A peaceful exchange of knowledge and customs....
But when ships appear in orbit over the Pluto colony they bring with them anything but peace. A small contingent of Marines are forced to make desperate choices as they scramble to find survivors and stay out of the grasp of the invaders.