Captain James Conrad: An uncharted island. Let me list all the ways you're gonna die: rain, heat, disease-carrying flies, and we haven't started on the things that want to eat you alive.
Hank Marlow: Who's winning the war?
Captain James Conrad: Which one?
Hank Marlow: That makes sense, I guess.
Hank Marlow: Kong's a pretty good king. Keeps to himself, mostly. This is his home, we're just guests. But you don't go into someone's house and start dropping bombs, unless you're picking a fight.
Preston Packard: I know an enemy when I see one.
Houston Brooks: I thought you were crazy.
Bill Randa: I wish I was.
Mason Weaver: We don't belong here.
Preston Packard: We're soldiers, we do the dirty work so that families back home don't suffer! They shouldn't even know that a thing like this exists!
Mason Weaver: The world is bigger than this.
Preston Packard: Bitch, please.
Captain James Conrad: I guess no man comes home from war, not really.
Bill Randa: This planet doesn't belong to us. Ancient species owned this earth long before mankind. I spent 30 years trying to prove the truth: monsters exist.
Answer: The chains are anchor chains from the ship wrecks that were there.