The Louisiana Purchase included 529,402,880 acres (2,142,417 sq kilometers). Prior to the Louisiana Purchase, the entire United States contained 434 million acres (1,756,335 sq kilometers), so the addition of the Louisiana Territory resulted in doubling the country's area. Historically, the Louisiana Purchase stands out as one of the rare times that such a large piece of land was peacefully negotiated for and not fought over. The land of the Louisiana Territory now comprises the states (or parts of) Arkansas, Colorado, Iowa, Kansas, Louisiana, Minnesota, Missouri, Montana, Nebraska, North Dakota, South Dakota, Oklahoma and Wyoming.
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