DSCA Multi-Service Tactics, Techniques, and Procedures for Defense Support of Civil Authorities (DSCA) ATP 3-28.1 MCRP 3-30.6 (Formerly MCWP 3-36.2) NTTP 3-57.2 AFTTP 3-2.67 SEPTEMBER 2015 Multi-Service Tactics, Techniques, and Procedures (MTTP) for Defense Support of Civil Authorities (DSCA) describes Title 10, United States Code (USC), military involvement as they operate unilaterally or along with state National Guard (NG) forces in DSCA environments. Military (operating under all authorities) and civilian after-action reports identify the need for expanded joint military and interagency procedures to enhance military and civil interoperability. For effective DSCA operations, active, reserve, and NG personnel operating under differing military authorities should understand the integration of capabilities, duties, and legal limitations as they support state and federal civilian agencies. DSCA domestic emergencies or activities (including all hazard disaster response operations) present unique challenges for the Department of Defense (DOD) because personnel work under differing legal authorities and chains of command when coordinating and working with non-DOD, state, local, and tribal agencies. This publication enhances military understanding as Title 10, USC, and Title 32, USC, DOD forces work side by side in typical DSCA force organizations and outlines some of the challenges impacting DOD support operations.