The Americas in particular saw major societal developments. The abolition of Slavery in the United States led to the breakdown of the Atlantic slave trade, which was already suffering from the abolition of slavery in most of Europe in the late 1820s and 1830s. In the United States, civil war between the Confederate States of America and the Union states led to massive deaths and the destruction of cities such as Chambersburg, Pennsylvania; Richmond, Virginia; and Atlanta, Georgia. Sherman's March to the Sea was one of the first times America experienced total war, and advancements in military technology, such as iron and steel warships, and the development and initial deployment of early machine guns added to the destruction. After the American Civil War, turmoil continued in the Reconstruction era, with the rise of white supremacist organizations like the Ku Klux Klan and the issue of granting Civil Rights to Freedmen.
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Prominent assassinations, targeted killings, and assassination attempts include: