text: Chapter 1
  1-121. COMSEC, while not a core competency, is an essential capability of signal support to implement
  trusted systems. Together, the core competencies and essential capability enable commanders’ exercise of
  command and control and integration of the other warfighting functions. Chapter 2 contains a more detailed
  discussion of the core competencies and essential capability of the Signal Corps.
  SECTION III – SIGNAL IN ARMY OPERATIONS
  SUPPORT TO JOINT OPERATIONS
  1-122. The Army is interdependent with the joint force and serves as the foundation on which the joint force
  conducts land operations. The Army conducts operations to gain, sustain, and exploit control over land to
  deny its use to an enemy. It does this with combined arms formations with the mobility, firepower, and
  protection to defeat an enemy and establish control over land, resources, and populations. Army capabilities
  enable joint force success across multiple domains, and in the information environment. The Army provides
  key enabling capabilities to the joint force, including communications, intelligence, protection, and
  sustainment support.
  1-123. A secure, robust, and reliable communications system gives the joint force commander the means to
  assimilate information and to exercise authority and direct forces over large geographic areas and a wide
  range of conditions. A communications system that provides connectivity throughout the operational area
  from the strategic to tactical levels is vital to plan, conduct, sustain operations, and enable information
  superiority (JP 6-0). Joint commanders use the network to exercise command and control and integrate the
  joint force components.
  1-124. Army contributions to joint command and control include establishing, maintaining, and defending
  the communications and network architecture to support Army and joint forces in the theater. The network
  provides connectivity between Army forces and unified action partners in the joint operations area.
  1-125. Army communications planners must include joint interoperability in their plans. Differences in
  policies, technologies, levels of capabilities, and resources when integrating communications support
  between joint and multinational forces create challenges that cannot be mitigated without in-depth planning
  at all levels. As an example, when integrating with joint mission partners, Army network planners must align
  their information sharing, COMSEC, technical engineering, and interconnection policies and procedures with
  those established by the communications system directorate of a joint staff (J-6). Considering interoperability
  requirements as early as possible in the planning process mitigates the added complexity of joint
  communications planning.
  1-126. The DODIN-A can adapt, and the network main effort shifts, as the theater matures and forces
  transition between phases of an operation. DODIN operations control authorities and responsibilities shift as
  an operation matures and units arrive in the affected theater. Refer to ATP 6-02.71 for details on the transfer
  of DODIN operations authorities across the operational phases.
  ARMY STRATEGIC ROLES
  1-127. The Army accomplishes its mission by supporting the joint force in four strategic roles: shape
  operational environments, prevent conflict, conduct large-scale ground combat, and consolidate gains (FM
  3-0). Strategic roles are not tasks assigned to subordinate units, but broad goals of an Army force. The Army
  conducts tactical tasks to accomplish each of its strategic roles to varying extents across each phase of an
  operation. Refer to FM 3-0 for more information about the Army’s strategic roles.
  SHAPE OPERATIONAL ENVIRONMENTS
  1-128. Army operations to shape help dissuade adversary activities designed to achieve regional goals short
  of military conflict. As part of operations to shape, the Army provides trained and ready forces to geographic
  combatant commanders in support of their theater campaign plan. The theater army and subordinate Army
  forces assist the geographic combatant commander in building partner capacity and capability and promoting