What is the best summary of this reading passage?

henry's friend had been killed.
little medicine was available to the injured.
the number of casualties was high.
the scene took place at night.

here is the passage:

the red badge of courage by stephen crane.

the men dropped here and there like bundles. the captain of the youth's company had been killed in an early part of the action. his body lay stretched out in the position of a tired man resting, but upon his face there was an astonished and sorrowful look, as if he thought some friend had done him an ill turn. the babbling man was grazed by a shot that made the blood stream widely down his face. he clapped both hands to his head. "oh! " he said, and ran. another grunted suddenly as if he had been struck by a club in the stomach. he sat down and gazed ruefully. in his eyes there was mute, indefinite reproach. farther up the line a man, standing behind a tree, had had his knee joint splintered by a ball. immediately he had dropped his rifle and gripped the tree with both arms. and there he remained, clinging desperately and crying for assistance that he might withdraw his hold upon the tree.