Want this question answered?
Indeed. However, it is not called 'secession' but "Mexican Cession".
The Mexican Cession was divided into New Mexico Territory, and Utah Territory.
Mexico was the most recent inquiry.
Mexico
The Wilmot Proviso proposal was to prevent the introduction of slavery in any territory acquired from Mexico
the United states paid Mexico $15 million dollars for this land, which became known as the mexican cession
There are only two of them: the country of Mexico - the original - and New Mexico, a territory acquired by the US from Mexico.
On February 2, 1848 by the means of the Guadalupe-Hidalgo Treaty, ending the Mexican-American War (1846-1848).
The Mexican Cession.
After the Compromise of 1850 the United States acquired both the New Mexico Territory and Utah Territory as parts of its territory. The Mexico and the US border was also agreed on the south.
David Wilmot
slavery in the territory acquired from Mexico