Board Thread:General Discussion/@comment-26210095-20151117214943/@comment-26210095-20151118001254

Yes. They assassinated the captain of the Havens, which dosent sound like an all out attack, but more like a stealthy assassination. They might have burned a few ships, but for a whole pirate NATION, with lots of havens other then Umbar, it might have inconvenienced them, but not permanently crippled.