Fireground command is an enormous topic. This article is designed to help you start mastering fireground command, which is an ongoing, ever-evolving process. Today’s fireground is vastly different from that in the past. It is ever-changing and always will be. Building construction, fire behavior, fire loading, use of synthetics, changes in staffing, differences in personal protective equipment (PPE), and the lack of experience all contribute to the moving target of fireground command excellence. We must remain humble and vigilant throughout our careers.