Well I hope you all have heard the new one that was reported today.
"The Mexican Army has been reported as having crossed US borders."
Last time I checked that was called an invasion and a declaration of war. But of course that was 30 years ago so maybe the definition has changed for an invasion of other country's military. I'll have to check.
We should have the USMC sweep and clear the areas where Mexican Army units are said to have been doing this.
Close air support and pre-plotted artillery should also be immediately available.