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