The component that is missing is something like this document:
http://www.hqmc.marines.mil/Portals/...R%202012).docx
Surely TMP has some kind of COOP that should be followed in cases where the command structure is disrupted. The COOP should support the mission of: Help the survivors, Reconnect with other teams and Survive. The mission alone is inadequate for continued operations and my players see that as well, though they are making the best of it.