Originally inhabited by Native American tribes, territorial Mississippi has a complex history rife with fierce contention. Since 1540, when Hernando de Soto of Spain journeyed across the Atlantic and became the first European to stumble across its borders, the territory has been the center of passionate international disagreements. After numerous boundary shifts, Mississippi was finally admitted as the twentieth state of the Union on December 10, 1817.In The Mississippi Territory and the Southwest Frontier, 1795--1817, Robert V. Haynes does more than recount history; he explores the