Complex sentence: But news broke out about this, and they were attacked by a group of men called the "the Cobalt Men", who had named themselves after one of the villians during the fight with the villians during the Stamford incident.
Split into simpler sentences: But news broke out about this and so then they were attacked by a group of men called the "the cobalt men". Nameing themselves after one of the villians during the fight with the villians during the Stamford incident.