[Ruy Dias de Bivar]

Slavery in MEXICO was abolished in 1829, but you could still buy them, mostly American Indian children as late as 1873.

After the camp grant massacre of Apaches by 150 Papago and Mexican Indios (only 6 whites were involved)the captured children were sold in Mexico.
The US almost caused another INDIAN WAR when it was decided the tribes in the US had to also free their slaves per the 13 amendment. Those slaves were mostly Mexicans and other tribes.
The Cherokees had their own slave rebellion in 1842.

[TheThirdRuffian]

There were slaves in New Mexico (called peonage) well after the civil war and it continues today somewhat.

So much so the anti-peonage law of 1867 has been continuously amended u til as recently as 2000.

Old Mexican ranching families (albeit in the USA) have generational Zuni slaves.

[marktwain]

The US almost caused another INDIAN WAR when it was decided the tribes in the US had to also free their slaves per the 13 amendment. Those slaves were mostly Mexicans and other tribes.

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As I recall, the 13th Amendment was not enforced against the Pacific Northwest tribes until about 1900 or a little after.