"...packed with soldiers..."
Given that the aircraft in question was a JetRanger, the invasion force consisted of three of four disoriented Mexicans at most.
"A Mexican helicopter like this one..."
Not
that much like the other one...
Still, it makes a change from SEMAR Mi-17s wandering over the border (as happened again last week over Roma). One of these days someone will point out that
The Russians are invading!, and then the tracers will start flying.
I/C