SCOPE This handbook provides guidance for planning and conducting land operations requiring the close coordination of Army forces and Marine Corps forces under the control of a joint force land component commander within a joint operations area. It presents considerations and options that joint force commanders can employ when designating a joint force land component commander and describes the authority and responsibilities of a joint force land component commander. PURPOSE This handbook describes guidance for establishing the command relationship based on the joint force commander's concept of operations. It addresses formation, functions, and organization of the joint force land component commander. It also discusses the operational questions of who, what, when, and how of operations in support of major operations or campaigns by a joint force commander. It is not the intent of this handbook to supplant approved joint doctrine; nor is it the intent to restrict the authority of the joint force commander from organizing the force and executing the mission in a manner he deems most appropriate to ensure unity of effort in the accomplishment of the overall mission. APPLICATION The guidance in this handbook applies to combatant commanders, sub-joint task forces, and subordinate components of these commands. This handbook is used for guidance and reference only. If conflicts arise between the contents of this publication and the contents of joint publications, the joint publications will take precedence for the activities of joint forces.