Three errata to the Gates of Chaos rulesheet as printed, effective immediately:
The entire last paragraph of the Fortifications section should be replaced with: "Fortifications are a special type of Holding card. These are defensive structures permanently associated with a particular Province. When brought into play, Fortification Holdings are attached to the Province from which they entered play, or to any of your Provinces if they were not brought into play from a Province. Fortifications enter play paying costs as normal, but enter play unbowed (straightened), are controlled by the player whose Province it is that they're attached, and there is no limit to the number of Fortifications a Province may have attached. When a Province is destroyed, its attached Fortifications are also destroyed.
During battles, Fortifications exist at their Province’s battlefield, and you may only take actions from a Fortification at the current battlefield."
Also, the rules fix to Ikoma Ayumu Experienced should read: "The rulebook Tactical Advantage is a Battle/Open action for you if you choose Ayumu to perform it."
Finally, there is a tech erratum to The Eternal Rainbows: "The Eternal Rainbows: Its reminder text should be considered NOT to be reminder; it should be an explicit effect of the Terrain, setting the duration of the bonus."