text: Chapter 2
  cyberspace domain. Both fixed station and expeditionary signal capabilities enable homeland defense
  operations in the land, air, maritime, space, and cyberspace domains.
  2-133. During a homeland defense operation, civil authorities continue to operate and perform many of
  their routine functions. While homeland security activities of some interagency partners sometimes overlap
  with homeland defense activities, major military activities are the responsibility of the DOD. Interagency
  mission partners cannot perform these activities, but their support is essential for mission success.
  2-134. Unity of effort among all homeland defense participants is fundamental and essential (JP 3-27). For
  this reason, homeland defense operations in the United States often require connections to the civilian
  communications infrastructure to interoperate with various state and federal agencies and nongovernmental
  organizations. Planners consider joint and interorganizational interoperability as early as possible in the
  planning process.
  Note. The Department of Homeland Security is the lead federal agency for security and defense
  of civilian U.S. Government cyberspace within the United States.
  SIGNAL-ENABLING COMMANDS AND STAFFS
  2-135. Signal-enabling commands and staffs support the DODIN-A as a global enterprise network. These
  entities develop signal capabilities, establish policy and guidance, perform DODIN operations, provide
  strategic infrastructure, and secure the DODIN-A. These commands, staffs, and agencies support the strategic
  support area, extend the network to tactical units, and preserve the Army’s ability to operate in cyberspace.
  CHIEF INFORMATION OFFICER/G-6
  2-136. The Chief Information Officer (CIO)/G-6 is the principal staff assistant and advisor to the Secretary
  of the Army for information management, information technology, and their effects on warfighting
  capabilities. The CIO/G-6 is also the force modernization proponent for information management (AR 5-22).
  2-137. The CIO/G-6 establishes policy for Army use of information technology systems and networks. This
  responsibility includes evaluating existing Army information management and information technology
  policies and overseeing their implementation. The CIO/G-6 sets the strategic direction for, and supervises
  the execution of, Army information management programs and policy. These programs and policies include
  network architecture, information sharing policy, cybersecurity policy, the Army cybersecurity program,
  resource management, process modernization, and synchronization of the Army’s network activities. The
  CIO/G-6 exercises Headquarters, Department of the Army oversight to ensure compliance with federal
  statutes for information technology reform (The Clinger-Cohen Act).
  UNITED STATES ARMY CYBER COMMAND
  2-138. ARCYBER is the Army Service component command to United States Cyber Command.
  ARCYBER is the primary Army headquarters responsible for cyberspace operations to support joint
  requirements. ARCYBER is the single point of contact for reporting and assessing cyberspace incidents,
  events, and operations in Army networks and for synchronizing and integrating Army responses. When
  directed, ARCYBER conducts offensive and defensive cyberspace operations to support other Army
  operations, ensure U.S. and allied freedom of action in cyberspace, and deny the same to adversaries and
  enemies. ARCYBER provides appropriate-level interactions both as a supported and as a supporting
  commander to Army commands, other Army Service component commands (including theater armies), direct
  reporting units, and joint, interorganizational, and multinational elements.
  Army Cyber Operations and Integration Center
  2-139. The Army Cyber Operations and Integration Center is an operational element of the ARCYBER
  headquarters. It is the top-level control center for Army cyberspace activities. The Army Cyber Operations
  and Integration Center provides situational understanding for Army networks and situational awareness of
  the wider DODIN. The Army Cyber Operations and Integration Center also provides worldwide operational