This was a rapid influx of fortune seekers to sutter's mill in california in 1849. gold rush this shoshone indian girl was an invaluable guide to lewis and clark on their trek west. sacagawea this was a territory in the western u. s. purchased from france for $15 million in 1803. construction on this began in 1811 and was the first federally funded turnpike in the united states. this is the name given to the purchase of the alaska territory from russia in 1867, for which the u. s. paid $7 million. this was an act of continental congress which initially organized the first united states territory and was to be the basis for governing how the united states would expand westward. this was a major u. s. route from missouri to the northwest in the 19th century. this was the forced migration of the cherokee indians to oklahoma in 1838-39.