Joshamee Gibbs

Early Life
Originally, Gibbs was a member of the Royal Navy. He served on the HMS Dauntless while Elizabeth Swann and her father crossed the Atlantic Ocean. It's thought that Gibbs was thrown out of the Royal Navy sometime later and became a pirate.

Somewhere along the line, Gibbs meets Jack Sparrow and the two become friends or at least learn to trust one another.

Life aboard The Black Pearl
Shortly after Jack and Will steal the HMS Interceptor, they come to Tortuga. The first thing they do is find Gibbs. After a little convincing from Jack, Gibbs agrees to help go after the Black Pearl and rounds up a crew.

When Jack falls behind at Isla de Muerta, Gibbs takes command of the ship. Unfortunately, the Black Pearl catches up to them. Though the crew fought as best they could, the Interceptor was destroyed and the crew captured.

Later, Gibbs and the crew are rescued by Elizabeth. They take control of the Pearl and sail away. Later, they sail to Fort Charles to save Jack.

With Jack captaining the Black Pearl, they set off in search of treasure. After an incident with Jack escaping from a Turkish prison, it's finally revealed that Jack is after the Dead Man's Chest.

In pursuit of the Dead Man's Chest, the Pearl lands on Pelegosto, where Gibbs and the crew are captured by cannibals. However, they are able to save their selves and Jack.

Gibbs continues to help Jack in his quest for the Dead Man's Chest. He is one of the few pirates that survive the attack by the Kraken. When Tia Dalma asks who'd be willing to save Jack, Gibbs is first to volunteer.