User blog comment:SeaTerror/Abolishment of the Shichibukai System/@comment-24529455-20140216184501/@comment-7890302-20140216231836

If three worked together, maybe they could take a Yonkou, but one of them would die, and maybe another, and that doesn't count the Yonkou's crew. Even if the marines won, another Yonkou would come in and wipe out the remaining marines.