2-49. Soldiers deployed overseas follow rules of engagement established by the Secretary of Defense and adjusted for theater conditions by the joint force commander. Within the homeland, Soldiers adhere to RUF (sometimes including SRUF). There are many similarities between them, such as the inherent right of self-defense, but they differ in intent. Rules of engagement are by nature permissive measures intended to allow the maximum use of destructive power appropriate for the mission. RUF are restrictive measures intended to allow only the minimum force necessary to accomplish the mission. (See Chapter 4, for more information on use of force in regards to DSCA tasks.)