The Military is made of the 3 major branches with the Marine Corps falling under the Navy. Together, they all rely on USCYBERCOM to defend the military’s networks.  Currently, the DoD is taking the lead on cyber defense for the nation (due to the fact that they have more capabilities and resources than other entities), but this will change in the future, and the DoD’s cyber AO will diminish.  A compromise between military needs, civilian responsibilities and civil liberties will have to be reached.