Led famously by the pirate Rhansmarc the Cruel, the pirates of the Black Banner are the principal adversaries of the Prim Rose buccaneers, who seek to unify the islands of the Outer Rim under the rule of the Good Ladies of Mariana Bay.
The Black Banner is more of an idea than it is a formal fighting force: the thousands of vessels that pledge their allegiance to Rhansmarc the Cruel, who leads them, operate with their own interests in mind, and are difficult to rally to a singular cause. Though the Black Banner has no singular base of operations, Rhansmarc the Cruel commands a fortress on the isle of Calypso, deep in the Outer Rim. From there, he coordinates his raids against the nobility of Mariana Bay.
The Black Banner is informally aligned with the Dread Legion in Mordaine.