When the invasion was not imaginary ...

That is, the invasion of Mexico by the United States. TPM passes along that

Natalie Martinez, a researcher at Media Matters, flagged yesterday that since May 2018 President Trump’s reelection campaign has run roughly 2,200 Facebook ads using the word “invasion.” Unsurprisingly, a quick perusal suggests they’re all about immigration — namely, a Mexican and/or South American “invasion” of the United States which can only be prevented by President Trump and his wall.

Guess that's Trump's election message, successfully transmitted to the El Paso killer who drove 571 miles to find his brown targets.

Mexicans remember heroism under foreign assault from their own perspective. In 1931, muralist Diego Rivera painted bravery in defense against the firepower of the United States Marines in the Palacio Nacional de Mexico:

To defend [Chapultepec] castle [above Mexico City], Santa Anna installed General Nicolas Bravo with 1,000 troops, fifty military cadets, and some artillery in buildings and supporting earthworks. Beginning on 12 September [1847], Winfield Scott’s artillery bombarded the castle; on 13 September, he launched his main attack.... The battle is rich in lore. Five teenage military cadets who refused to retreat and who defended the castle to their death—one jumped from the castle with the Mexican flag wrapped around his body, so the Americans could not capture it—are widely memorialized in Mexico as "Los Niños Héroes." ... Losses: U.S., 130 dead, 703 wounded, 29 missing; Mexican, at least 1,000 dead, wounded, or captured.

Encyclopedia Britannica

Mexicans continue to take casualties of our dangerous entitlement. Time to tear down walls and restore peaceful commerce to the border.