President James K. Polk acquired the Oregon Territory through a combination of diplomacy and the threat of military action. Initially, the U.S. and Britain shared the territory under the Oregon Treaty of 1818, but tensions grew over the boundary, with Polk advocating for the slogan "54°40' or Fight!" to assert U.S. claims to the northern latitude. Ultimately, in 1846, the Oregon Treaty was negotiated, peacefully establishing the boundary at the 49th parallel, thereby securing the territory for the United States to avoid conflict with Britain. This acquisition aligned with Polk's broader goal of Manifest Destiny, which sought to expand U.S. territory across North America.
Oregon
President Polk sent troops to Mexico to seize the Oregon Territory, which began the Mexican War that the U.S. ultimately won to acquire Oregon.
James K. Polk added the Oregon Territory and Texas to the United States
The slogan of the campaign was not disavow by Polk. Polk pledged to settle the boundary of Oregon Territory with Britain.
The northern boundary of the Oregon territory was settled by a treaty with Britain while Polk was president. He settled for less that the 54-40 he had campaigned for.
This was the Oregon Treaty which established the boundary between the Oregon Territory and Canada.
Fruitless in negotiations and diplomacy, he achieved his aims through war.
Secretary of State James Buchanan negotiated the treaty that set the boundary of the Oregon territory.
James Knox Polk got the British to sign the treaty deciding the Oregon border.
he promised to take control of all of the Oregon territory
The United States entered into joint custody of the Oregon Territory with Great Britain on October 20, 1818, while James Monroe was President. The Oregon Treaty, which set the boundary between the U.S. and British parts of the territory, was signed on June 15, 1846, while James K. Polk was President. Present-day Oregon received its statehood on February 14, 1859, while James Buchanan was President.
In 1846 under President James K. Polk the U.S. signed a treaty with Britain that gave the U.S. possession of the Oregon territory.