On the night of October 8, 1871, fire swept across northeastern Wisconsin with terrifying speed. Entire settlements vanished. Families fled into rivers, wells, fields, and clearings. In Peshtigo, a booming lumber town built amid the forests of Wisconsin, hundreds died within hours. Across the surrounding countryside, the toll climbed even higher. It became the deadliest wildfire in American history. That night, another city also burned. That same night, flames tore through Chicago. The destruction of one of America's great cities seized the nation's attention, while the catastrophe to the north slowly slipped from public memory. America's Forgotten Fire tells the story of the Peshtigo Fire through the people who lived it: priests, lumbermen, immigrants, farmers, Native families, and those caught in a landscape primed to burn. Drawing on survivor accounts, newspapers, government records, local histories, and contemporary reports, the book follows Father Peter Pernin into the Peshtigo River, traces the lumber empire that transformed the forests surrounding the town, and reconstructs the lives of families scattered across the settlements in the fire's path. From the forests of Wisconsin to the burning streets of Chicago, America's Forgotten Fire reconstructs one extraordinary night when two disasters struck the nation at once-and explores why America remembered one while nearly forgetting the other. This is the story of the deadliest wildfire in American history, the world that created it, and the people who survived long enough to tell us what happened.