US: Efforts by the U.S. government in coordination with coalition partners and other nations, international organizations, and nongovernmental: organizations to create a secure and stable environment and to provide for the basic human needs of the population to include food, water,: sanitation, and shelter. UK: Following an agreement or ceasefire, and the emergence of a generally permissive environment, the peace support force acts as part of a complementary Instrument of National Power to reduce the level of tension and increase the level of Campaign: Authority. The coercive and deterrent effects of military force to uphold the internationally derived mandate may be necessary, however, the: level of Campaign Authority will normally warrant the use of military force in self-defense only.