American War by Omar El Akkad
Sarat Chestnut, born in Louisiana, is only six when the Second American Civil War breaks out in 2074. But even she knows that oil is outlawed, that Louisiana is half underwater, and that unmanned drones fill the sky. When her father is killed and her family is forced into Camp Patience for displaced persons, she begins to grow up shaped by her particular time and place. But not everyone at Camp Patience is who they claim to be. Eventually Sarat is befriended by a mysterious functionary, under whose influence she is turned into a deadly instrument of war. The decisions that she makes will have tremendous consequences not just for Sarat but for her family and her country, rippling through generations of strangers and kin alike
Review from School Library Journal:
Benjamin Chestnut, a historian of the Second U.S. Civil War (2075–93), chronicles the life and times of his aunt Sarat. When he first meets her, she is a stoop-backed woman who hides in the shed behind his house, sleeps on the floor, and speaks to no one. When readers first meet her, she is a feisty six-year-old, ready to take on the world. And what a world it is: climate change has created sea rise that wiped out both U.S. coasts for miles inland, and searing heat burns the soil so that food must be brought in from foreign shores. Sarat is caught in the middle of a burgeoning war between the states, based on Northern demands that the South give up fossil fuels. This hardship breeds resentment, and violence seeps into Sarat's life. The girl's mother insists they leave their home in Louisiana for points north, but they make it only as far as the refugee camp at the border of the northernmost Southern state. Here, Sarat learns her cultural history from those who recruit her to serve the South. Interspersing the work with news, government reports, and interviews, Benjamin describes Sarat's growing resistance, willingness to fight fiercely, and subsequent capture and torture. Twenty years later, when Benjamin meets her, she is broken but unrepentant; Sarat serves up one last horrible act of revenge to ensure victory for the South.