The phrase encapsulates a particularly fervent sentiment prevalent in the United States during the 1844 presidential election. It represented a strong desire for American expansionism, specifically focusing on the acquisition of the Oregon Territory from Great Britain. The numbers refer to the latitude 5440, which was the northern boundary desired by some expansionists for the territory. Its use exemplified the aggressive nationalism that characterized the era.
This slogan highlighted the intensity of the debate surrounding westward expansion and the concept of Manifest Destiny. It demonstrated the willingness of some Americans to risk war with Great Britain to secure control of the Pacific Northwest. The political rhetoric associated with this phrase shaped the outcome of the election and influenced subsequent diplomatic negotiations regarding the Oregon Territory.