Marine Corps Tactical Publication 3-40B expands upon MCWP 4-1, Logistics Operations, and provides detailed guidance to Marine Corps logisticians for the conduct of tactical-level logistics. This publication is primarily intended for commanders and their staffs who are responsible for planning and conducting logistic operations support at the tactical level of war. The secondary audience is commanders and staff officers who require logistic support or who will benefit from a greater understanding of this support at the tactical level. This publication supersedes MCWP 4-11, Tactical-Level Logistics, dated 13 June 2000.