Commander

"Commander" (中佐) is a military rank which is also sometimes used as a military title depending on the individual customs of a given military service. Commander is also used as a rank or title in some organizations outside of the military, particularly in police and law enforcement.

In One Piece, commander is a Marine rank just below that of a captain. Some pirate crews, such as Whitebeard's crew, are so big that they're divided into different divisions with a commander leading each one.

Whitebeard Pirate commanders:


 * Division 1: Macro
 * Division 2: Portgas D. Ace
 * Division 3:
 * Division 4: Thatch (deceased)
 * Division 13: Atomos