The Louisiana Purchase was the basis of the US claim and England's claim was based on the voyage of James Cook in search of the Northwest Passage and the activities of the Hudson Bay Company in the Oregon Country. The Treaty of 1818 provided for joint occupation and settlement as well as other issues. Instead of Fifty-four Forty or Fight the two nations settled their dispute with the 1846 Oregon Treaty.
Washington, Oregon, Idaho
In 1846 Britain agreed for the US to take control of the territory
philipines
That depends on which war is in question.
A previous Wiki answer:Oregon was acquired as a result of a war with France, part of the settlement being the Louisiana Purchase. It became a state on February 14, 1859, and was the 33rd state to join the union.Read more: How_did_the_United_States_acquire_Oregon
American Samoa.
Texas
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.
hi
Oregon
No, it was the Spanish American War.
The present US States of California, Nevada, Utah, New Mexico and Arizona.