The Department of Homeland Security asked Naval Station Great Lakes for “limited support in the form of facilities, infrastructure, and other logistical needs to support DHS operations,”

Much as it pains me to say it, this is an on-the-books legal order so long as no active duty member of the military directly interacts with any arrested persons. Sharing of facilities and equipment is generally allowed and the only persons who can make rules to change this are the Secretary of Defense directly or Congress indirectly, and probably the President as well, perhaps by executive order nowadays.

Hopefully there are some real patriots who are willing to ignore illegal orders.