This publication, Army Techniques Publication ATP 3-90.61 Brigade Special Troops Battalion August 2015, describes how the BSTB provides combat support to the BCT. The battalion contains military intelligence; communications; and chemical, biological, radiological, and nuclear (CBRN) platoons and provides mission command for the units assigned and attached to the BCT. The BSTB is organic to the armored brigade combat team (ABCT) and the infantry brigade combat team (IBCT) that have not converted to brigade engineer battalions. ATP 3-90.61 provides doctrinal guidance for commanders and staffs who are responsible for planning and executing brigade special troops battalion (BSTB) missions in brigade combat teams (BCTs). It is designed to serve as a reference for the development of tactics, techniques, and procedures; materiel and force structures; institution and unit training; and standard operating procedures (SOPs). The principal audience for ATP 3-90.61 is all members of the profession of arms. Commanders and staffs of Army headquarters serving as joint task force or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army will also use this publication.