A Hymn Before Battle
By John Ringo
"With the Earth in the path of the rapacious Posleen, the peaceful and friendly races of the Galactic Federation offer their resources to help the backward Terrans -- for a price. Humanity now has three worlds to defend. As Earth's armies rush into battle and special operations units scout alien worlds, the humans begin to learn a valuable lesson: You can protect yourself from your enemies, but may the Lord save you from your allies."
The beginning of an alien invasion series, part of which (Gust Front) takes place in Fredericksburg, Virginia.