What: “Join or Die! Again!” bronze trophy
When: During Year One (beginning of the game)
Where: Lost Souls Alliance base
After being rescued by Salvador, you'll see a familiar face in the base, so to speak. Talk to her and ask her if there are any new messages for him and she will mention this quote. When you are through talking to her, this trophy will unlock.
This trophy can be missed if you do not get it before giving her the teeth mold.