3-15. The organizations discussed in this section are used across the range of military operations. The authorities and responsibilities described in the preceding sections on Unity of Effort, Theater Army, and Theater Special Operations Command never change; they are prescribed in public law through United States Code. A commander’s campaign plan relies on the capabilities provided by the entire Department of Defense as well as those capabilities provided by other government agencies to create unity of effort. Army special operations units execute a variety of activities, missions, and tasks following the principles of discreet, precise, and scalable. Army special operations forces execute these principles in over 160 countries (roughly 80% of the countries in the world) on a daily basis. U.S. military and civilian authorities should be familiar with the terms for a number of special operations elements in addition to those described as task forces. Table 3-1, page 3-5, depicts Army special operations command and control echelons used where task forces are required.