Antebellum expansion Modern history
american westward expansion idealized in emanuel leutze s famous painting westward course of empire takes way (1861).
the antebellum age period of increasing division in country based on growth of slavery in american south , in western territories of kansas , nebraska lead civil war in 1861. antebellum period considered have begun kansas–nebraska act of 1854, although may have begun 1812. period significant because marked transition of american manufacturing industrial revolution.
manifest destiny belief united states destined expand across north american continent, atlantic seaboard pacific ocean. during time, united states expanded pacific ocean— sea shining sea —largely defining borders of contiguous united states today.
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