Explain in detail the usage of the trem heroism in the play of G.B.Shaw Arms and the Man?

At the beginning of the play Sergius, like both Catherine and Raina, imagines bravery as the will to undertake glorious and theatrical actions. This belief leads the young Bulgarian Major to lead a regiment of cavalry against a line of machine guns. Despite his dumb luck, the action identifies him as an incompetent and somewhat ludicrous figure, halting his advancement in the ranks. When he returns at the end of the war Louka challenges his romantic notions of bravery. Sergius admits that “carnage is cheap”: anyone can have the will to inflict violence (45). Louka submits that the subtle bravery required to live outside social rules and constraints is more worthy of praise. At the play’s end Sergius demonstrates this particular kind of bravery when he embraces Louka in front of the others and agrees to marry her.

Like Sergius, Captain Bluntschli also undermines traditional understandings of bravery. He tells Raina that there are two types of soldiers - young and old - not brave and cowardly. The young are too inexperienced to know true fear, and the old have reached their age by championing survivalism over heroics. The Swiss mercenary is willing to face danger when necessary but he does not act in ways that court death and is always relieved to avoid combat.