> There is one IAM control plane for all commercial AWS Regions, which is located in the US East (N. Virginia) Region. The IAM system then propagates configuration changes to the IAM data planes in every enabled AWS Region. The IAM data plane is essentially a read-only replica of the IAM control plane configuration data.
and I believe some global services (like certificate manager, etc.) also depend on the us-east-1 region
> There is one IAM control plane for all commercial AWS Regions, which is located in the US East (N. Virginia) Region. The IAM system then propagates configuration changes to the IAM data planes in every enabled AWS Region. The IAM data plane is essentially a read-only replica of the IAM control plane configuration data.
and I believe some global services (like certificate manager, etc.) also depend on the us-east-1 region
https://docs.aws.amazon.com/IAM/latest/UserGuide/disaster-re...