A shootout is a gun battle between armed groups. A shootout often, but not necessarily, pits law enforcement against criminal elements; it could also involve two groups outside of law enforcement, such as rival gangs. A shootout in a war-like context (i.e. regularly constituted armed forces or even guerrilla or insurgent forces) would usually be considered a battle (depending on size), rather than a shootout. Shootouts are often portrayed in action films and western films.