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Having coined the phrase "manifest destiny" the previous July, journalist John L. O'Sullivan argued in his newspaper New York Morning News that the United States had the right to claim the entire Oregon Country.

Historical image related to Having coined the phrase "manifest destiny" the previous July, journalist John L. O'Sullivan argued in his newspaper New York Morning News that the United States had the right to claim the entire Oregon Country. from December 27, 1845

Manifest destiny

Cultural belief of 19th-century American expansionists

Manifest destiny was the imperialist belief in the 19th-century United States that American settlers were destined to expand westward across North America, and that this belief was both obvious ("manifest") and certain ("destiny"). The belief is rooted in American…
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John L. O'Sullivan

American columnist and politician (1813–1895)

John Louis O'Sullivan was an American columnist, editor, and diplomat who coined the term "manifest destiny" in 1845 to promote the annexation of Texas and the Oregon Country to the United States. O'Sullivan was an influential political writer and advocate for the Democratic…
Source: Wikipedia (CC BY-SA)

Oregon Country

Early-19th-century U.S. fur trade district in North America

Oregon Country was a large region of the Pacific Northwest of North America that was subject to a long dispute between the United Kingdom and the United States in the early 19th century. The area, which had been demarcated by the Treaty of 1818, consisted of the land north of…
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December 27

Day of the year

December 27 is the 361st day of the year in the Gregorian calendar; four days remain until the end of the year.
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