...nited States from Mexico by the treaty of Guadalupe-Hidalgo......Feb. 2, 1848 Fort Laramie transferred to the United States......1849 Fort Bridger sold for $8,000 to the Mormons......1853 Sioux Indian war begins; Lieutenant Grattan and twenty-eight men sent from Fort Laramie to arrest an Indian who had shot a cow of a Mormon emigrant. The Indians refusing to give up the culprit, Grattan fires, a...