It is key to note the youthful and naive enthusiasm displayed by Henry in Chapter One as he is enraptured by his Homeric ideas of war, heroism and battle. We are introduced to a very vain, narcissistic and innocent boy indeed, who, over the course of the novel, matures greatly as he faces and has to confront both the realities of war and the reality of his own successes and failures. Note the way the narrator talks to us about this youthful Henry and his desire to enlist:
He had burned several times to enlist. Tales of great movements shook the land. They might not be distinctly Homeric, but there seemd to be much glory in them. He had read of marches, sieges, conflicts, and he had longed to see it all. His budy mind had drawn for him large pictures extravagant in colour, lurid with breathless details.
We can see here the impression of war that Henry has. War for him is "extavagant in colour" and "lurid with breathless details," which is sharp contrast from the actual mud and dirt reality of war that he encounters. We see that for Henry, he enlists because of his dreams of honour and glory, that he gets a taste of when he says goodbye to his schoolmates and they "throng about him with wonder and admiration." The "gulf" he senses between them makes him "swell with pride." Enlisting for Henry is an action that is done for selfish reasons, for the glory and status that he feels he will gain through being a soldier and engaging in such romantic exploits as war. He has a lot to learn.