AWS CloudFormation StackSets is now available in AWS GovCloud (US-East), EU (Stockholm), and Asia Pacific (Hong Kong) Regions
AWS CloudFormation has expanded the availability of StackSets to AWS GovCloud (US-East), EU (Stockholm), and Asia Pacific (Hong Kong). StackSets allows you to centrally manage deployments of resources to multiple accounts and regions in a single operation enabling you to easily deploy a baseline level of functionality to your accounts before they are actively used. StackSets is also integrated with AWS Organizations so you can take advantage of automatic deployments whenever an account enters an Organization.
Source:: Amazon AWS