In one of his plays, an arms manufacturer named Murk is spurned by Anna Balicke in favor of her true love Andreas after Andreas returns from fighting in World War One, while another of plays features Pierpont Mauler, the owner of a meat packing plant who antagonizes a member of the Black Straw Hats named (*) Joan Dark.  
One of this playwright's title characters abandons his pregnant lover Sophie, seduces Johanna, causing her to drown herself, and kills his friend Ekart.  In one of his plays, an arms manufacturer named Murk is spurned by Anna Balicke in favor of her true love Andreas after Andreas returns from fighting in World War One, while another of plays features Pierpont Mauler, the owner of a meat packing plant who antagonizes a member of the Black Straw Hats named (*) Joan Dark.  He may be best known for a drama in which the Fraternization Song is sung by a prostitute named Yvette Pottier and in which Eilif, Kattrin, and Swiss Cheese are the three children of a woman who struggles to make her way during the Thirty Years' War.  For 10 points, name this author of Baal, Drums in the Night, and Mother Courage and her Children.
One of this playwright's title characters abandons his pregnant lover Sophie, seduces Johanna, causing her to drown herself, and kills his friend Ekart.  
Bertold {Brecht}