6-5. Each operation is unique and requires mission-specific analysis that develops a tailored sustainment force. Joint, interagency, intergovernmental, and multinational activities add complexity to the sustainment system. Special operations may be conducted in locations that make theater organic sustainment infrastructure support unfeasible. In these cases, the theater sustainment organizations facilitate, but do not provide, required sustainment support. In order to acquire support in these situations, planning efforts must incorporate a mix of theater assigned personnel; for example, geographic combatant command sustainment planners, theater sustainment command planners, and sustainment planners from the theater special operations command.