In chapter 3, How has the regiment changed ober the course of the march?

The cockiness and bravado displayed in earlier chapters has all but gone. The regiment is on the move and the threat of real battle is in the air. As the fighting draws closer and the sound of gunfire grows louder, Wilson tells Henry that he believes he will die in the battle. He gives Paul an envelope to deliver to his family. Fear and, in many, a resignation of death seems to be on the soldiers' minds; their earlier dreams of being a war hero have become merely child stories.