We bought the plains area from France, but we also got land from Spain ( Florida) and Russia (Alaska). California was gotten from Mexico.
Mexico
The US acquired the territory of Florida from Spain ceding it to the US.
Jefferson acquired The Louisiana Territory.
what borders did the United States gain when it acquired this territory in 1776
Louisiana purchase
Oregon
in 1846, Britain agreed for the US to take control of this territory.
Hawaii
The Louisiana Territory which is most often called the Louisiana Purchase.
Often as the result of armed conflict.
The Philippines.
Guam remains a US Territory acquired in the Spanish American War.