In the 1840s, the united states had a dispute over the oregon country with spain. great britain. france. mexico.

Expansionist competition into the region began in the 18th century, with participants including the russian empire, the united kingdom, spain and the united states. by the 1820s, both the russians, through the russo-american treaty of 1824 and the russo-british treaty of 1825, and the spanish, by the adams–onís treaty of 1819, formally withdrew their territorial claims in the region. i️ suppose there are the two britain and spain that would have been involved. i️ hope this , have a good day, and god bless. brainliest is always appreciated : )