Answer: Though best known for guiding the nation through the tumultuous four years of the Civil War, Abraham Lincoln also played an instrumental role in encouraging settlement and expansion of the American West.
The California Gold Rush was a major factor in expansion west of the Mississippi. That westward expansion was greatly aided by the completion of the Transcontinental Railroad in 1869, and passage of the Homestead Act in 1862.
The 1783 Treaty of Paris was signed on September 3, 1783 and ended the American Revolutionary War and established the early U.S. boundaries. ... Westward Expansion ended on February 14, 1912 when Arizona was admitted to the Union as the last of the 48 contiguous (adjoining) states.
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