Something had changed about Matt when he came back from the military. He'd acted like a big shot prior, boasting how he'd join the army and how he'd have more weight to throw around and get what he wanted. Despite having a bigger more muscled body, he was no longer aggressive. He became much more passive, taking orders and suggestions from his friends, now the one who was usually asked to get up and grab beer from the fridge.
He'd become soft-spoken, his voice quiet allowing others to speak over him. It no longer bothered him as much as before. Even stranger he never seemed interested in talking about girls either, seeming to speak to other men in a more kindred manner. He wore much less and displayed his body more prominently, camo thongs as his underwear, loving to pose his muscles for his friends.
Even while he seemed to care more about his appearance, with the freedom to grow his beard and style his hair he preferred to keep his head shaved. When his friends asked why, he just answered it was what his commander wanted. That only seemed to confuse them more, but after learning he'd visit site whenever his commander was back on base, they stopped asking questions.