Interstellar Warfare - Joe Mont

In the year 2435, a young man named Anthony Dawkins yearns for a life of his own. From a young age, he's been forced to raise himself and his beloved sister. Anthony's isolated parents also expect him to take over the family business once he was old enough. As an act of defiance, he joins the Unified Coalition Space Operations Army in a desperate attempt to secure an independent life for both himself and his sister, away from the stubborn control of his parents. While training to become an army trooper, Anthony uses his strong sense of independence to quickly adapt to the harsh demands of military life.

With Insurrectionist forces threatening all the Coalition holds dear, Anthony is sent to the stars to fight against the same enemy responsible for bombing his home city. But after his first deployment reveals that the Insurrectionists are only a small part of a much larger plot, Anthony and his fellow soldiers are thrust into the largest interstellar war in history seemingly overnight.

With the Coalition in chaos, Anthony must not only keep his promise to return to his sister but also fulfill his oath to defend the Coalition, her colonies, and her citizens.