Why is it significant in Chapter XIII of The Red Badge of Courage that Henry asks Wilson where he's going to sleep and what he's going to sleep in?

Henry would probably normally not be worrying too much
about the sleeping habits or whereabouts of his friend, Wilson. Henry had just returned
from his day in the woods after skedaddling at the first shots of the second Confederate
attack. He had been clubbed in the head by a fellow Union soldier and had just made his
way back to camp. He had been greeted by Wilson, who was the sentry on duty. As the
corporal led Henry back to the campfire to tend to his wound, Wilson called after him
to

"Put 'im t'
sleep in my blanket, Simpson. An'—hol' on a minnit—here's my
canteen..."

Wilson gave up
his own blanket and canteen for Henry to use, since he thought Henry had been wounded.
That's why Henry was asking his friend where he would be sleeping on this
night.