introduction

War, it is the fighting between nations or groups within a nation using military force. 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 campaign are traditionally called battles, although this terminology is not always applied to contentions 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 arise over issues such as territory, sovereignty, resource, or ideology, and if a peaceable resolution fails, is not sought, or is thwarted, war often results.