This publication, "Joint Communications System (Joint Publication 6-0)," is the keystone document for the communications system series of publications. It provides the doctrinal foundation for communications system support of joint operations across the range of military operations. The objective of the joint communications system is to assist the joint force commander (JFC) in command and control (C2) of military operations. While C2 alone will neither destroy an adversary target nor accomplish emergency resupply, no single activity in military operations is more important. The first element of C2 system is people - people who acquire information, make decisions, take action, communicate, and collaborate with one another to accomplish a common goal. The second element of the C2 system taken collectively are the facilities, equipment, communications, and procedures essential to a commander for planning, directing, and controlling operations of assigned forces pursuant to the missions assigned. Although families of hardware are often referred to as "systems," the C2 system is more than simply equipment. High-quality equipment and advanced technology do not guarantee effective C2. Effective C2 starts with well-trained and qualified people and an effective guiding philosophy and procedures. One role of the communications system is to ensure connectivity throughout the operational area, thus providing JFCs with the capability to effectively plan, conduct, and sustain joint operations. A second role is to provide JFCs the principal tool with which they collect, transport, process, protect, and disseminate information. Through the exchange of information, effective C2 integrates joint force components, allowing them to function effectively across vast distances in austere or complex environments and in all weather conditions. The third role of the communications system is to provide processes and procedures which help ensure information availability to facilitate joint and multinational operations. The communications system supporting US military forces must have the capability to rapidly adapt to changing demands; to provide information that is needed (the right information); where needed (the right place); and when needed (the right time), protected from interception and exploitation and presented in an actionable format. By meeting these fundamental objectives, the communications system allows joint forces to seize opportunity and meet mission objectives. A joint force linked and synchronized in time and purpose is considered networked. The joint force capitalizes on information and near simultaneous dissemination to turn information into actions. An effective communications system helps the JFC conduct distributed operations in a nonlinear battlespace. To do this, the communications system must be interoperable, agile, trusted, and shared. This publication has been prepared under the direction of the Chairman of the Joint Chiefs of Staff (CJCS). It sets forth joint doctrine to govern the activities and performance of the Armed Forces of the United States in operations and provides the doctrinal basis for interagency coordination and for US military involvement in multinational operations. It provides military guidance for the exercise of authority by combatant commanders and other joint force commanders (JFCs) and prescribes joint doctrine for operations and training. It provides military guidance for use by the Armed Forces in preparing their appropriate plans. It is not the intent of this publication to restrict the authority of the JFC from organizing the force and executing the mission in a manner the JFC deems most appropriate to ensure unity of effort in the accomplishment of the overall objective.