I believe they detain people and turn them over to locals.
The probably WILL turn them over. But does anyone remember NDAA? Military now has legal ability to arrest and detain terrorists in the USA and send to Gitmo.
“....detain people and turn them over to locals.”
The Insurrection Act of 1807 is a United States federal law (10 U.S.C. §§ 251–255; prior to 2016, 10 U.S.C. §§ 331–335) that governs the ability of the president of the United States to deploy military troops within the United States to suppress civil disorder, insurrection, and rebellion.
The general purpose of the Insurrection Act is to limit presidential power, relying on state and local governments for initial response in the event of insurrection. The Posse Comitatus Act prohibits the use of the United States Army and Air Force (which has also been extended by executive direction to the Navy) for routine law enforcement.
They can spot from the air, supply and service vehicles and use them for transport. They can only defend themselves or use weapons when their life or priority A property is threatened. Trump has actually done more than he has to with the assignment of National Guard Troops at title 32 status and used federal funds to pay the bill. And if he had assigned them with title 10, they could have done nothing at all and the states wouldn’t pay a thing….and get nothing in return. In theory, If the governors had ordered in the NG, it would have been at title 32 orders and they would have had to pay the bill. They’re getting off light.
rwood