war
An organized, armed, and, often, a prolonged conflict that is carried on between states, nations, or armed political organization using armies and soldiers. Typically to either resolve diplomatic or political disputes or as an aggressive diplomatic tool against other countries. War are usually carried out between two or more military of the opposing factions.
This tag can be applied to any depiction of war, either historical or fictional, as well as various aspects of it (such as death and destruction), either literally or symbolically.