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Causes of the Civil War Statistics

By the Numbers

Between 1840 and 1860, estimated number of people that entered the United States: 4 million13

Of those that immigrated to the U.S. between 1840 and 1860, the percent that headed for northern states: 90%14

Size of territory ceded by Mexico to the United States with the signing of the Treaty of Guadalupe-Hidalgo in February 1848: 525,000 square miles or 1.4 million square kilometers15

Free black population in 1830: 319,599
Enslaved black population in 1830: 2,009,04316

Free black population in 1840: 386,293
Enslaved black population in 1840: 2,873,64817

Free black population in 1850: 434,495
Enslaved black population in 1850: 3,204,31318

Free black population in 1860: 488,070
Enslaved black population in 1860: 3,953,76019

In the election of 1860, the total number of votes that Republican candidate Abraham Lincoln received in Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, and Texas: zero

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