[not2b]

Mexico did suffer invasion and occupation by the French in the 1860s. The US was busy with the Civil War and in no position to try to enforce the Monroe Doctrine (Monroe's statement saying the US would oppose any European attempt to re-establish colonies in the Western Hemisphere).

[SllX]

A fair point, but that story ends with French withdrawal and Maximillian I’s execution after a Republican victory.

You may be interested in the Revolutions podcast though which touches on these events from a couple of different perspectives, but includes an entire part dedicated to Revolution in Mexico.