March 5, 2042

Communism hasn’t worked anywhere it’s been tried, including the Americas. Living conditions south of the Rio Grande have become much worse, Now, a loose aggregation, called the Mestizo Alliance, forms in Mexico and is joined by factions from every country to the south. The goal is to invade the United States, kill all the Gringos, and gain more living space.

Under the Libertarian Nationalist immigration policies adopted by a majority of nations in 2030, most of the Mestizos previously living in the United States had returned south of the border. Now many of them join the Alliance.

People of pure Spanish ancestry in these countries gain advanced knowledge of all this, and escape being slaughtered by leaving on huge luxury liners, under the assumption that they will be able to return safely when the smoke clears.

The Alliance is poorly armed, but begins an epic march to the North. There are tens of millions of them. From the air, the mile-wide column looks like an army of ants, extending south through Mexico, halfway to Guatemala. When they come to the United States, they use dynamite to blow gaps in the border wall, and continue their march into Texas.

U.S. Satellite Recon has seen them well beforehand, but NASA waits until they breech the wall, then American fighter planes strafe the entire column with a new poison ordnance that kills on contact, but is non-toxic to the surrounding environment.

It takes three days and hundreds of planes to complete the job. The very few that escape, it is said, are hunted down and painlessly executed by the returning Spanish populations, now very well rested from their cruise.