The Mountain Meadows Massacre was caused in part by events relating to the Utah War (May 1857 – July 1858), an armed confrontation in Utah Territory between the United States Army and Mormon Settlers. In the summer of 1857, however, Mormons experienced a wave of war hysteria, expecting an all-out invasion of apocalyptic significance. From July to September 1857, Mormon leaders prepared Mormons for a seven-year siege predicted by Brigham Young. Mormons were to stockpile grain, and were prevented from selling grain to emigrants for use as cattle feed. As far-off Mormon colonies retreated, Parowan and Cedar City became isolated and vulnerable outposts. Brigham Young sought to enlist the help of Indian tribes in fighting the "Americans", encouraging them to steal cattle from emigrant trains, a