The Elastic Container Service (ECS) from Amazon Web Services (AWS) is a fully-managed cloud Container Orchestration Service that runs multiple Docker containers on the cluster using AWS EC2 instances. ECS simplifies the deployment process by providing an automated way to manage AWS ECS Clusters, making it consistent and repeatable. Terraform is used to set up an ECS cluster of EC2 instances, covering topics such as VPC setup, EC2 instance configuration, application load balancer setup, ECS task definition creation, and service provisioning. The final Terraform configuration is saved in a Github repository. To deploy ECS using Terraform, one needs to establish an isolated network by defining the VPC and related components, creating EC2 launch templates, configuring auto-scaling groups, setting up application load balancers, and provisioning ECS clusters and services. Terraform helps manage infrastructure at scale, providing features such as state management, build workflows, policy as code, and resource visualization.