This United States Army manual, Training Circular TC 3-12.2.98 Hunt Operations February 2024, provides tactics, techniques, and procedures by which defensive cyber forces conduct hunt operations as part of defensive cyberspace operations. The tactics, techniques, and procedures contained in this publication are intended to be used as a guide and are not prescriptive. This publication outlines the framework in which defensive cyber forces conduct hunt operations to identify and defend against malicious activity in the DOD network. The principal audience for this publication is cyber professionals in the United States Army Cyber Protection Brigade who conduct defensive cyberspace operations and the commanders and staffs of units who request and receive defensive cyberspace operations support from the cyber protection brigade. 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.