Wilson's Creek was the first major Civil War battle fought west of the Mississippi River, and where the first Union general was killed in action. The costly Southern victory on August 10, 1861, focused national attention on the war in Missouri. Wilson’s Creek National Battlefield commemorates and interprets the battle within the context of the war in the Trans-Mississippi West.
Republic, Mo. – From Saturday, Aug. 8 through Monday, Aug. 10, 2026, Wilson’s Creek National Battlefield will observe the 165th anniversary of the Battle of Wilson’s Creek with special programs honoring the Union and Southern soldiers who died in the Aug. 10, 1861, battle for control of Missouri.