The day is won. Within the symposium of American military debate, the space domain is conclusively a militarized and war-fighting domain, after decades of infighting. Space combat will mark a change in warfare, distinct from previous epochs, but faces conceptual and principled unknowns in how it will be employed. The aim of space superiority, “the degree of dominance in space of one force over any others that permits the conduct of operations at a given time and place without prohibitive interference from space-based threats, enables the protection of American interests in, from, and through space.