User blog comment:Adele Addict/At World's End Question..../@comment-4035883-20110601133700

I actually wondered that for a while, but I have figured out the four. And they are...

Barbossa: Mutiny, Isla de Muerta, and more. Will: The fight in the Smithy, Isla Cruces, and waayyyyy more. Tia Dalma: Not really explained, but I assume it was during one of their previous misadventures with each other. Elizabeth: Fighting on Isla Cruces, and of course, the Kraken taking down the Pearl (Success!!!).

And there you have it! I hope this helped!