When the First World War thrust the United States into a dire global conflict, the Sacramento Valley was quick to mobilize. Many of America's first air units for combat were trained at Mather Field, while local farms filled some of the largest food supply orders for the Allies. Many women eschewed tradition and joined the industrial workforce at Liberty Iron Works, Southern Pacific Railroad and more. Though many banded together, the region's homefront was not without tension. Gripped by xenophobia, groups like the Liberty League formed local chapters to hunt spies, and local police forced displays of patriotism from suspected German sympathizers. With exclusive content from the Sacramento Public Library's Special Collections, librarians Amanda DeWilde and James Scott reveal the struggles and triumphs of the Sacramento region during the First World War.