The Confederate government of Missouri was a continuation in exile of the government of pro-Confederate Governor Claiborne F. Jackson following the failed Price–Harney Truce at Planters' House in St. Louis, June 11, 1861. It existed until General E. Kirby Smith surrendered all Confederate troops west of the Mississippi River at New Orleans, May 26, 1865.
Meeting in Neosho, Missouri, Governor Jackson and other leading Missouri secessionists, acting as the Missouri General Assembly, enacted an ordinance of secession on October 28, 1861; however, the legal status of this ordinance was not accepted by Missouri's Union supporters, then or later. The secession government applied for and, on November 28, 1861, was granted admission to the Confederacy as the purported 12th state of the Southern federal republic.
As a result of military operations, however, particularly the Battle of Pea Ridge in March 1862, the Confederate government of Missouri was not able to establish control over much of the state; its jurisdiction extended only as far as Confederate military strength could reach. Governor Jackson and his government were forced into exile. The exiled government established operations in Marshall, Texas, as part of the Trans-Mississippi bloc of Southern civil governments.
Although Confederate supporters in Missouri were unable to make their secession good, the Southern government-in-exile sent legislators to the Congress of the Confederate States, and Missouri was represented by the twelfth star on the Confederate battle flag.
- Irby, Jr., Richard E. "A Concise History of the Flags of the Confederate States of America and the Sovereign State of Georgia". About North Georgia. Golden Ink. Retrieved November 29, 2006.
- The Confederate government of Kentucky, one of two rival state governments in Kentucky
- The Restored Government of Virginia, one of two rival state governments in Virginia
| List of C.S. states by date of admission to the Confederacy
Admitted on November 28, 1861 (12th)