Hatred in the Ashes — William W. Johnstone

In a dystopian America, a madwoman has replaced the president, and now an ex-mercenary must set things right -- from a USA Todayâ€"Bestselling author.
 
While Ben Raines and his Rebel army have triumphed in Africa, America has been consumed in the flames of anarchy. After a terrifying civil war, the commander-in-chief has vanished, a new constitution has been born, and a power mad president has soared to infamy. She wants Raines brought down, dead or alive, for crimes of treason. But Raines has the men, the weapons, and the guts to start his own bloody revolution!
 
Twenty-seventh in the long-running series!