What crime did John Rackham made?

John Rackham, also known as Calico Jack, was a notorious pirate in the early 18th century. He is best known for his acts of piracy in the Caribbean, where he and his crew attacked merchant ships. Rackham was ultimately captured in 1720 and was tried for piracy, a crime punishable by death at the time. He was hanged later that year in Port Royal, Jamaica.