Those are functionally, not "our" borders and never were. "we" never had control of those borders and cannot possibly defend them. "We" need to establish real borders, borders of the enclaves with establishments of internal sovereignty, and enforce those against ALL invasions of that sovereignty.

As for operational areas, that's fine, I would not have much respect for the other ends of any national borders either. I never left my values (or hardware) behind when traveling south of the Rio Grande.