times of change ?'s

What challenges does Jack Smith face as a soldier in Vietnam? (a bulleted list is fine)

• being very young
• booby traps
• you can't see a bullet you can only hear them
• elephant grass
• ambushes
• bombs and napalm
• the temperature
  
  How does Smith’s attitude toward war change?

he relises it is harder than it looks and that you are out there for totaly different resons, to protect your buddies, and to protect yourself.