7 warlords of the middle regions

The 7 warlords of the middle regions are 7 pirates that operate in the middle regions, they all are extremely dangerous and very powerful, each having crews of 300 or more men, the 7 warlords are Zazo, Viper, Sicx, Kotha, Mako, The Monger, and Kramos. Each of these pirates has been in the 7 warlords since the start, except Sicx, who took the place of Nick Jones after he beat him in a fight. This is the one rule they have, if another pirate challenges the warlord to a fight and the warlord accepts, if the challenger beats the warlord, then he will take the warlord's place.

The warlords can do anything because they don't really report to anyone, but if one of the warlords attacks another the other 5 would be expected to help. The UU has massive bounties on each of the warlords, but nobody really tries to take them out because that would just be a death wish. Some of the warlords like Viper and Zazo are trying to overthrow the UU, but it is a slow process.