The Mexican Civil War was an armed conflict lasting for 7 years that was located in Mexico. There were factions in the war; the Mexican Army which supported Spanish colonial rule; the Mexican Republican Army which supported the democratic rule of Antonio Lopez de Santa Anna; and the Empire Army, which supported Iturbide family's efforts to become Emperor of Mexico. In 1826, the United States intervened, and supported the Mexican Republican Army, which eventually prevailed in 1828.