It's official. After a 3 day war, Mob City got enough power to claim the riders HQ. The fall of riders is described in these photos.
The fall of riders.
Mid-way through the burning.
And... the end result.
As per the Mob City war policy, the riders have 3 days to raise up a new base, or their faction will be disbanded and all territory will be claimed by Mob City.
UPDATE: It's been past 3 days. The faction "Riders" has lost all territory occupied by the HQ remains.