The Centralia Massacre occurred during a broader Confederate invasion of northern Missouri in 1864, led by General Sterling Price and his Missouri State Guard. The invasion was strategically designed to influence the 1864 presidential election by capturing St. Louis and the state capitol at Jefferson City. As part of this larger campaign, General Price encouraged guerrilla warfare, particularly targeting the disruption of railroads. William T. Anderson and his guerrilla company were among the Confederate forces participating in this strategy of irregular warfare across Missouri.
On September 27, 1864, Confederate bushwhackers under William T. Anderson's command executed 24 captured Union army soldiers in Centralia, Missouri. This summary execution represented a particularly brutal episode of the guerrilla campaign. Notably, Jesse James, who would later become a notorious outlaw, was among the killers involved in this massacre. The execution of these prisoners marked an escalation in the violence of the conflict in Missouri, reflecting the increasingly brutal nature of guerrilla warfare during the final year of the Civil War.
The massacre was followed by the Battle of Centralia, in which a large detachment of Union mounted infantry attempted to intercept Anderson's forces. However, the Union forces suffered catastrophic losses, with nearly all of the mounted infantry being killed in combat. This engagement demonstrated the effectiveness of Anderson's guerrilla tactics against conventional Union military units and highlighted the serious threat posed by Confederate irregular forces operating in Missouri during this period of the war.
The American Civil War (1861–1865) was the deadliest conflict in American history, killing an estimated 620,000 to 750,000 soldiers and an unknown number of civilians. The Confederate States of America, formed by eleven seceding Southern states, faced the Union in four years of warfare across 23 states and territories. Major engagements included First and Second Bull Run, Antietam (the bloodiest single day in American history, September 17, 1862), Chancellorsville, Gettysburg (July 1–3, 1863), Vicksburg (surrendered July 4, 1863), and Sherman's March through Georgia and the Carolinas (1864–1865). President Lincoln issued the Emancipation Proclamation on January 1, 1863, transforming the war's stated purpose to include the abolition of slavery and enabling the enlistment of approximately 180,000 Black men in the United States Colored Troops. Confederate General Robert E. Lee surrendered to Ulysses S. Grant at Appomattox Court House on April 9, 1865. The war resolved the question of secession and ended American slavery, though Reconstruction would face sustained resistance in its attempt to secure civil rights for formerly enslaved people.
24 Union soldiers were executed in the massacre; nearly all Union mounted infantry were killed in the subsequent Battle of Centralia.
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