What feelings did crane employ by attributing feelings to nature?

Crane uses personification and similie to make the setting (nature) come alive. An example of this can be found in the following lines;

A shell screaming like a storm banshee went over the huddled heads of the reserves. It landed in the grove, and exploding redly flung the brown earth. There was a little shower of pine needles.

Bullets began to whistle among the branches and nip at the trees. Twigs and leaves came sailing down.