As an Army veteran, I find this kind of keyboard warrioring to be insanely cringe.

The “last time” was 20 years after Mexico had secured their independence from Spain and a few years after fending the military was worn down fending off incursions from France. Mexico was barely able to control or defend northern territories from indigenous tribes at the time, never mind a full country’s military.

It was also nearly 180 years ago and has no bearing on modern conflict.

it is still extremely doubtful that Mexico will fare well in a conflict with the United States

I don't have any military knowledge, so I defer to those who do, but also I think Mexico could seriously harm the US by… paying for a border wall.

All those undocumented workers the US wants to keep out, they're really important to the US actually functioning.

Fragility like this is not a small cause of this mess

Like most things.. risk-reward.. and different times. 180 years ago, the dollar and power was different.

Right now? Trump is risking a worldwar trying to save the dollar/energy/make the history books.

They can take Texas back while they're at it. Or perhaps Elon wants to take it.