Yes they have been doing this sort of thing for decades...at least once I know of they flew into AZ in a helicopter and shot at Border Patrol.
Mexican military has been crossing the border for decades, have been videoed helping drug smugglers, have harassed Border Patrol, ranchers, other residents. Once that I am aware of they blew threw a Port of Entry, when returning a few minutes later they were questioned and said they had gone to get sodas...without bothering to even stop at the Port. An incident I personally witnessed- a Mexican tank came right to the border fence, parked and aimed the tank turret right at the US Port of Entry. The tank sat there for around 20 minutes and when the men got out and off of it they were laughing at their great little joke.
When caught crossing or across the border...Mexico always claims one of two stories:
1) Deny it was military at all, claim must be cartel people dressed as Mexican military.
2) Claim they were not aware they had actually crossed the border...it’s all a big misunderstanding you see...
It is past time for this country to stop allowing that BS.
https://www.latimes.com/nation/la-na-border-mexico-20140402-story.html
Six men in police tactical clothing are suspected of shooting a man to death, firing more than 100 rounds into his Phoenix home in what some are calling a Mexican drug cartel hit.
(snip)
Former Rep. J.D. Hayworth, R-Ariz., said Tuesday on 550 KFYI-AM the he had acquired an internal memo identifying one of the suspects as a former member of the Mexican military, and he interviewed Mark Spencer of the Phoenix Law Enforcement Association. The men were said to be wielding two AR-15 assault weapons and wearing full body armor and black assault gear similar to uniforms worn by Phoenix police tactical teams.
Oh so true. Our group took down a group of illegals 75 miles inside Texas. When frisked by BP, all had Mexico military ids. WTF!,, This is an invasion and has been going on for years. Secure the damn border, Trump