in section 1 Achilles is a renowned warrior; what else does the start of the book reveal about him?

In the first chapter, we learn that Achilles is an outcast. We also learn that Patroclus is his adoptive brother. The two boys share a bond, but Patroclus is not always accepting of his young brother's affection. Lastly, we learn that Achilles is the most formidable of the Greek warriors.