What is Crane suggesting by celebrating nature as--in a sence-- the heroine of the novel?

I need to 'explore' the contrast between nature and war, beginning with this excerpt... "After a time the sound of musketry grew faint and the cannon boomed in the distance. The sun, suddenly apparent, blazed among the trees. The insects were making rhythmical noises. They seemed to be grinding their teeth in unison. A woodpecker stuck his imprudent head around the side of a tree. A bird flew on the light-hearted wind. Off was the rumble of death. It seemed now that Nature has no ears. "