Marine Corps Tactical Publication (MCTP) 3-01B, Air Assault Operations, describes how infantry and aviation units plan and conduct air assault operations. MCTP 3-01B emphasizes the coordination necessary between ground, air, combat support, and combat service support organizations concerning the planning sequence and tactical employment of ground and aviation elements. It describes the versatility of air assault operations and explains the tactical fundamentals of air assault operations for ground-based operations once ashore.