Spade Pirates

The Spade Pirates (スペード海賊団, Supēdo Kaizokudan) is the former pirate crew of Portgas D. Ace that was founded two years before the current storyline.

History
After Ace was defeated in a battle against Whitebeard and asked to join Whitebeard's crew, the rest of the Spade pirates tried to take Ace back. They were all defeated in their attempt to get their captain back, fortunately however they were spared and taken aboard. They have since been integrated along with their captain into the ranks of their former enemy.

Trivia

 * Their name "Spade", as well as their captain's name "Ace", are both references to the spadille.