This United States Army manual, Army Techniques Publication ATP 3-04.119 Aviation Security and Support Battalion Operations January 2022, provides guidance concerning security and support battalion (SSB) structure, organization, responsibilities, and functions focused from aviation battalion to platoon level. SSBs are unique in that they conduct National Guard civil support (NGCS) and homeland security (HS)/homeland defense (HD) missions but are also capable of supporting other military light utility aviation and reconnaissance requirements in both continental United States (CONUS) and outside the continental United States (OCONUS) permissive environments. Together with other regulatory guidance and civil support doctrine, this publication aids personnel in planning, train-up, and execution phases of SSB missions. A highly trained, skilled aviation force and a well-planned operation are essential to success, regardless of duty status (state active duty or title duty). The principal audience for ATP 3-04.119 is aviation commanders, leaders, officers, technicians, non-commissioned officers (NCOs), and aircraft maintenance personnel in security and support (S&S) units. Commanders and staffs across Department of Defense (DOD); members of certain federal, state, and local agencies; and trainers and educators throughout the Army also use this publication. Joint Force Headquarters-State (JFHQ-State), State Army Aviation officers (SAAOs), and Operations Directorate of Joint Staff (J-3) should be familiar with the special missions, operational law, and authorities in Chief National Guard Bureau Instruction (CNGBI) 3000.04 and CNGBI 3100.01A as needed for SSBs.