American Westward Expansion

Construction of the First Transcontinental Railroad (1863–1869)

1862 - 1869

Comstock Lode silver boom in Nevada (1859–1874)

1850 - 1878

Cattle drives and the Chisholm Trail (1866–1887)

1865 - 1887

California Trail during the Gold Rush (1848–1855)

1848 - 1855

California Gold Rush (1848–1855)

Bleeding Kansas and pre–Civil War border warfare (1854–1861)

1854 - 1861