Aliens are coming, and the United States Army needs to gear up to fight them
From the author: I pulled a lot of my experiences in the military for the past fifteen years, time I’ve worked in civil construction, and both of my engineering degrees as I write in this series. I’ve run mathematical models on orbital mechanics and flight characteristics. It’s been crazy fun, especially because it starts with a gargantuan cannon and gets crazier from there!
Kal Spriggs 