1、WarWar is a prolonged state of violent, large-scale conflict involving two or more groups of people. Wars may be prosecuted simultaneously in one or more different theaters. Within each theater, there may be one or more consecutive military campaigns. Individual actions of war within a specific camp
2、aign are traditionally called battles, although this terminology is not always applied to contentions in modernity involving aircraft, missiles or bombs alone in the absence of ground troops or naval forces.The factors leading to war are often complicated and due to a range of issues. Where disputes
3、 arise over issues such as territory, sovereignty, resource, or ideology, and a peaceable resolution fails, is not sought, or is thwarted, war often results.A war may begin following an official declaration of war in the case of international war, although this has not always been observed either historically or currently, nor in the case of civil wars. A declaration of war is not normally made in internal wars.
