In an era of escalating threats, just as military forces rigorously train to ensure readiness and integration, the private sector must embrace the same ethos of continuous, tested development. This talk explores why exercises, ranging from tabletop scenarios to advanced cyber range simulations, are essential for assessing and strengthening cyber resilience across people, processes, and technology. It highlights how these exercises foster collaboration, sharpen incident response, and bolster supply chain resilience, while also demonstrating the necessary operational readiness needed to meet the stringent compliance requirements of the Cyber Resilience Act, NIS2, DORA and similar legislation.