Como Jack Sparrow acabou fazendo um acordo com Davy Jones?

De wikia do PotC :

At some point in time, Davy Jones would strike a bargain with Jack Sparrow to resurrect his beloved vessel the Wicked Wench, which he would rename as the Black Pearl, in return for a hundred years of servitude aboard the Dutchman.

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Beckett wanted to hit Jack where it hurts the most, so he set the Wicked Wench on fire as his men held Jack by, and made him watch his beloved ship burn. Jack was able to escape from the guards and tried to save the Wench from the flames, but instead was hit by a falling beam of the Wench's burning cabin. Jack found himself in a dream-like state, and, realizing he was dying, summoned Davy Jones and made a deal with the squid-faced captain.

Da mesma página:

• Davy Jones: "You've been captain of the Black Pearl for thirteen years. That was our agreement."
• Jack Sparrow: "Technically, I was only captain for two years, then I was viciously mutinied upon."
• Davy Jones: "Then you were a poor captain, but a captain nonetheless! Have you not introduced yourself all these years as Captain Jack Sparrow?"

Para elaborar a resposta a essa pergunta, Jack trabalhou para a East India Trading Company sob Beckett quando lhe pediram para navegar em um navio desatualizado. O acordo era que o navio seria vendido a um xelim depois que ele entregasse a carga.

Esta carga era 100 escravos humanos.

Durante a entrega, Jack percebeu que não poderia completá-lo e libertou os escravos. Por causa disso, Beckett ordenou que a nave, a Wicked Wench, fosse queimada enquanto Jack observava. Enquanto o navio estava queimando, Jack tentou salvá-lo, quase morrendo e fazendo um acordo com Davy Jones, que ressuscitou os restos carbonizados como The Black Pearl fazendo Jack Captain por 13 anos.

Isso é revelado em um pequeno e inteligente diálogo no filme No fim do mundo entre Beckett e Jack.

• Becket: "We had a deal, Jack. I contracted you to deliver cargo on my behalf, you chose to liberate it."

• Jack: "People aren't cargo, mate."