Negotiator Badge
From City of Heroes: Rebirth - Wiki
Description
You were instrumental in stopping a war between the Clockwork and the Skulls.
How to Get
Earn the Negotiator accomplishment badge by completing Get the Clockwork out of the warehouse before the Skulls get involved mission from Tony Kord, Paula Dempsey, or Maurice Feldon.
In Ouroboros, as a Flashback mission, you must complete "Break up the Clockwork and the Skulls" which gives the mission "Defeat all the Clockwork and Skulls" in the Protector of Innocents (Level 1-15) section.