Bang,bang,you#39;redead.No,reallydead.Agroupoftwelveyearoldkidsplaywarinaforestbuttheaudienceviewstheactionthroughtheireyes.Theyfirerealmachineguns,hearmortarsexplodingaroundthem,anddodgebloodyshrapnelfromgrenades.IDeclareWarisamovieforyoungandadultaudiencesalike,featuringtwelvetothirteenyearoldactorsinthetraditionofSt…