The Battle of Black Jack, fought on June 2, 1856, just outside of modern-day Baldwin City, Kansas, proved to be a watershed moment in United States history as the pro- and antislavery forces fought what some historians consider the first unofficial battle of the Civil War during “Bleeding Kansas.” Kansas Free-State forces, led by abolitionists John Brown and Samuel T. Shore, fought and forced the surrender of proslavery forces led by border ruffian, editor, and U. S. Deputy Marshal Henry C. Pate. The Battle of Black Jack highlighted the escalating violence in Kansas as Free-State and proslavery forces became more organized and the levels of violence increased.