Invasion USA — William W. Johnstone

Little Tuscon, Arizona, just twenty miles north of the border, is a small town whose citizens believe in God, country, and hard work. But their peaceful existence is about to be shattered by Mara Salvatrucha--the murderous Central American gang known as M-15.

Culled from the scum of the earth, M-15 runs a drug smuggling operation through the ill-protected border, terrorizing defenseless communities into submission through theft, rape, and murder.

With Washington turning a blind eye to the crisis in Little Tucson, Vietnam vet Tom Brannon takes the law into his own hands and forms his own volunteer army, which he names The Patriot Project.

But now all hell's about to break loose, because M-15 is coming back to take out the Patriots. Outnumbered and outgunned, with the fate of their families, their homes, and their very country at stake, Tom Brannon and his men will meet the enemy. It's high noon in Arizona--and time to take America back once more.