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.
Battle is a term that applies to a localized military conflict between two enemy armies or smaller military units that occur on 1 or more days. The difference between a war and a battle is similar to the difference between a book and a chapter. War usually refers to a series of battles. I AGREE BUT. War is a term that applies to military conflict between two or more countries which transpire over months or years.