Nursing credentials and certifications. Nursing credentials and certifications are the various credentials and certifications that a person must have to practice nursing legally. 1  Nurses' postnominal letters (abbreviations listed after the name) reflect their credentialsâthat is, their achievements in nursing education, licensure, certification, and fellowship.
War is a state of armed conflict between societies. It is generally characterized by extreme collective aggression, destruction, and usually high mortality. The set of techniques and actions used to conduct war is known as warfare. An absence of war is usually called  peace . Total war is warfare that is not restricted to purely legitimate military targets, and can result in massive civilian or other non-combatant casualties.
proxy war - a war instigated by a major power that does not itself participate. state of war, war - a legal state created by a declaration of war and ended by official declaration during which the international rules of war apply; war was declared in November but actual fighting did not begin until the following spring.