The Reckoning of Hell was an event which turned the Nine Hells of Baator into its current state.[as of when?] The archdevils split into two factions. The first was led by Mephistopheles who was followed by Mammon, Dispater and Geryon. The second faction was led by Baalzebul who was followed by Zariel, Belial and Moloch.

Everything started when Baalzebul was overthrown by Asmodeus. Soon the two factions joined forces against the Lord of Nine.