Marine Corps Techniques Publication MCTP 12-10A (Formerly MCWP 3-35.1) Mountain Warfare Publication 2 May 2016, is a reference for all unit commanders and their staffs (trained or untrained in mountain warfare) and all leaders from the company level through regiment or brigade for use in operations that occur in mountainous terrain, snow, or cold weather. This publication is designed to be used with Marine Corps Reference Publication (MCRP) 3-35.1A, Small Unit Leader's Guide to Mountain Warfare Operations; MCRP 3-35.1B, Mountain Leader's Guide to Winter Operations; MCRP 3-35.1C, Mountain Leader's Guide to Mountain Warfare Operations; and MCRP 3-35.1D, Cold Region Operations. These publications cover a broad range of unit planning considerations that can be used across a range of military operations. This publication references formal individual and collective mountain warfare training programs available within the Department of Defense. Because of the rapid turnover in personnel, operating tempo, multitude of training commitments, and constraint of training resources for these environments, the Marine Corps Mountain Warfare Training Center cannot train all Marines. Therefore, this publication-used in conjunction with MCRP 3-35.1A, MCRP 3-35.1B, MCRP 3-35.1C, and MCRP 3-35.1D-identifies the skills that Marines need to be successful in mountainous, snow, or cold weather environments. During combat, these publications provide Marines with the doctrinal references they need to augment the instruction they receive from their unit's qualified mountain leaders. This publication supersedes Fleet Marine Force Manual (FMFM) 7-29, Mountain Operations, dated January 1980; FMFM 7-21, Tactical Fundamentals for Cold Weather Operations, dated September 1992; and FMFM 7-22, Tactical Fundamentals for Aviation in Cold Weather Operations, dated May 1991.