The above visualization shows how the domains layer from space above down to cyberspace, which connects all domains. I have added a littoral subdomain linking land and sea operations, the purview of the United States Marine Corps. Also included is an air assault subdomain, delineating the low-altitude portion of the air domain, which is filled with small- and medium-sized unmanned aerial systems in places like Ukraine.

Understanding this framework is critical for non-defense, expeditionary practitioners who operate in these domains and will be influenced by state and non-state military actors in them.

For educational purposes only. I have found these ideas personally useful in my career. Always do your own research.