In this session I will dive deep into potential failure modes of multi-region architectures and way to mitigate them through the exercise of continuous Resilience Testing and automation. AWS serverless services such as Amazon API Gateway, AWS Lambda and Amazon DynamoDB are available in multiple Availability Zones (AZs), which comprise of one or more discrete data centers with redundant power, networking, and connectivity. By using those services as part of your application, you are empowered to create highly available, fault-tolerant Well-Architected workloads. This satisfies the availability goals for most applications, but there are cases in which relying on multiple AWS Regions (physical locations around the world where AWS clusters data centers) is required. The choice of going multi-region may be necessary for businesses operating in the financial sector or in the case of specific applications that are on the critical path of a business; use cases that typically require higher than average uptime and reliability. Expect some theory, but also concrete examples that will apply that theory to practice.