Culture. college-educated vs military service prior to private sector. Start at 6:15. 0:00 for background.

STERLING: What you did is totally unacceptable.

CAMPBELL: I realize that.

STERLING: I want to be very clear about this. You were fired. I wanted you out. Copper wanted you out. And you would be, if it weren’t for this man. He thought you deserved another chance. That’s right. He fought for you. 

CAMPBELL: I don’t know what to say.

STERLING: Say nothing. You’re here because of Don Draper’s largesse.

CAMPBELL: Thank you. Thank you so much. 

STERLING: Now, I know you’re generation went to college instead of serving, so I’ll illuminate you. This man is your commanding officer. You live and die in his shadow. Understood?