[quote]When it came to the Ecumene Council, what events caused the disbandment of the Old Council and the reconstruction of the New Council? And who was the First Councilor of the Old Council and the New Council?[/quote] The Ecumene Council caused the Old Council of the Forerunner Empire to disband because The Master Builder test fired a Halo Ring, causing the death of the San'Shyuum on the planet, bringing the Master Builder to court, as well as his allies breaking away from him, disbanding the Council. Second, the First Councilors were. (Old Council)-Faber, Master Builder (New Council)-Splendid Dust of Ancient Suns