As the United States’ government crumbled, Mexico quickly became overrun with Americans fleeing their own country as their own people began to riot. In only a few short years, the survivors picked up the pieces and returned to a simple life similar to their ancestors. However, some of cities near the original border are still quite chaotic places.
There are rumours that the Mexican government is still in operation, deep in the south of Mexico. However, there is no sign of any such government attempting to reclaim it’s northern borders.