Nevada is a state in west USA. Nevada was formed from the Mexican cession of 1848. Prior to that date no settlement had been made in the State. In that year settlements were made by Mormons in the Carson and Washoe Valleys. In 1859 silver was discovered. In 1861 Nevada was organized as a territory, and on October the 31st, 1864, it was admitted as a State. In 1866 its territory was increased by portions of Arizona and Utah.