The climax of the play "Twelfth Night" occurs in Act III, Scene IV, when the mistaken identities and confusion reach their height. This is the moment when Viola, disguised as Cesario, delivers a duel challenge to Sir Andrew Aguecheek on behalf of Sir Toby Belch. However, this duel never actually occurs, as it is interrupted by Antonio, who mistakes Viola for her twin brother Sebastian. This climactic moment sets off a series of events that ultimately lead to the resolution and conclusion of the play.
