text: Appendix C
  assistance from civil authorities for domestic emergencies, law enforcement support, and other domestic
  activities, or from qualifying entities for special events (DODD 3025.18).
  C-37. Homeland defense and DSCA operations are conducted in a complex operational environment that
  contains layers of different jurisdictions (federal, state, territorial, tribal, and local), many agencies and
  organizations, the private sector, and several allies and multinational partners. Interorganizational
  coordination and synchronization with governmental and nongovernmental entities may assume a level of
  importance not matched in most overseas theaters of operations. Within the same city, Army forces may be
  simultaneously conducting different missions, each with distinct authorities and requirements. This could
  include adjacent units conducting—
  (cid:122) Deployment preparation activities.
  (cid:122) Homeland defense missions as directed by U.S. Northern Command or U.S. Indo-Pacific
  Command.
  (cid:122) DSCA in support of the Department of Homeland Security or other organizations.
  C-38. Changes in an operational environment based on threat action or other circumstances may cause
  changes to planned and ongoing operations. Army forces preparing to deploy to another theater may be tasked
  to support U.S. Army North instead. Additionally, units conducting DSCA may be required to transition to
  homeland defense, or vice versa. Commanders and staffs must remain agile to ensure they understand the
  responsibilities and authorities for different missions, remaining in constant contact with other unified action
  partners to ensure shared understanding. Depending on mission requirements and available personnel, this
  may include agency representatives, liaison officers, and staff representatives able to collaborate, share
  information, analyze ongoing activities, and participate in planning.
  HOMELAND DEFENSE
  C-39. When conducting homeland defense missions, U.S. Army North has been designated to serve as the
  land component command for U.S. Northern Command. Depending on the threat, defending critical
  infrastructure and maintaining force projection capability for joint and Army forces will require significant
  augmentation and cross-command integration. Commercial infrastructure plays a critical role in enabling the
  communications systems that directly support operations. This infrastructure may be damaged to the point
  that military and supporting operations are adversely affected.
  C-40. Protection functions are essential during any operation, and they take on specific importance during
  homeland defense. Protection during homeland defense includes measures and activities not only conducted
  for use by the joint force, but also for commercial, law enforcement, and government partners. These
  protection functions can be supported through a number of activities. Planning for these operations should
  include deception, mobility, dispersion, systems resiliency and redundancy, protective construction, warning
  and surveillance, and operations security. Additional coordination will be required if Army units are tasked
  to provide these capabilities for government and commercial partners or to build upon existing capabilities
  so that partners can conduct them themselves.
  C-41. Army forces support joint force and national efforts to provide the latest relevant information to the
  American public while maintaining operations security, and they will also counter disinformation posted on
  social media and distributed through other means. Timely, relevant, and effective responses are critical to
  mission accomplishment when a peer threat is using high volumes of disinformation to achieve its objectives.
  Unit commanders and other leaders follow their supported command’s public affairs guidance and act in a
  supporting role to local, state, and federal agencies.
  DEFENSE SUPPORT OF CIVIL AUTHORITIES
  C-42. Army support of civil authorities is vital to enabling other units that are deploying under contested
  conditions. The range of DSCA responses by Army forces includes support provided by the Regular Army,
  activated Army Reserve, and the National Guard in Title 32 United States Code (USC) or Title 10 USC
  status. Even in the absence of orders or in uncertain and chaotic situations, units providing support in the
  homeland enable core DSCA activities to provide support for domestic disasters, provide support for
  domestic CBRN incidents, provide support for domestic civilian law enforcement, and provide other
  designated domestic support. Domestic military operations are constrained by statute and policy to a greater