This is why “Command said the latest military zone will be part of the Fort Bliss Army base in El Paso.”

Effectively what happened was the land was turned into a part of the base. At every US base there is a line usually shortly before the gate, sometimes only at the fence line where you are considered “on base”. Once you are on base military police can arrest you since they have jurisdiction on base. Kinda like how if you commit a crime in an unincorporated area, the sheriff will arrest you, not city cops since that’s their jurisdiction.

Frankly though this type of move is unprecedented, as far as I know. While the fed can just give fed land to bases, I’ve never heard of it happening like this. It’s a loophole to keep it legal on paper but not in spirit.