This United States Marine Corps USMC manual, Marine Corps Tactical Publication MCTP 3-32F Deception May 2024, is designed to assist Marines while planning, preparing, executing, and assessing Marine Corps deception activities. It is also intended to inform the force of the relevance and importance of deception as a means to accomplish military objectives throughout the competition continuum. As such, this publication applies to Marines and civilians across the total force, at all echelons of command. It is primarily intended for practical use by commanders and deception planners at the tactical level (i.e., Marine expeditionary forces and below). This publication provides a brief overview of deception theory and methodology, outlines responsibilities across the Marine Corps, and integrates the deception planning process with the Marine Corps Planning Process. As with all doctrine, while this publication reflects current best practices, considerations for application varies based on circumstance, authorities, and available resources. NOTE: Appendix F contains classified information and is omitted from this public version.