Henry is a classic Hemingway man: a stoic man of action with a personal code of honor who also enjoys the pleasures of life. For instance, the three doctors who fail to treat Henry's leg are the antithesis of Hemingway men. Besides being timid and unsure, they fail the test of manhood by refusing to drink with Henry when he offers.
While Henry has many attributes of a Hemingway man at the start of the novel, he nonetheless evolves over the course of the novel. He gives up the macho posturing and womanizing of his fellow officers in favor of a life of commitment to Catherine. He also asserts his individualism by refusing to participate in what he sees as a corrupt and pointless war.
Manhood Quotes in A Farewell to Arms
"I am afraid of Him in the night sometimes."
"You should love Him."
"I don't love much."