Citation:
'54° 40' or fight!' was a slogan used during the 1844 presidential campaign, advocating for the U.S. to claim the entire Oregon Territory up to latitude 54° 40'. This phrase reflects the heightened tensions between the United States and Great Britain over territorial disputes in the Pacific Northwest, illustrating the spirit of expansionism that characterized the era of Manifest Destiny. The phrase symbolized the desire for U.S. expansion and showcased the willingness to confront foreign powers to achieve territorial claims.