Battlespace

Battlespace is the area of air, sea, and land that is directly involved in the war, often taken to include any technological, environmental, infrastructural, or temporal factors which may be relevant to the success of a mission [Collins English Dictionary].
Battlespace is a term used to signify a unified military strategy to integrate and combine armed forces for the military theatre of operations, including air, information, land, sea, and space, to achieve military goals. It includes the environment, factors, and conditions that must be understood to successfully apply combat power, protect the force, or complete the mission. This includes enemy and friendly armed forces, infrastructure, weather, terrain, and the electromagnetic spectrum within the operational areas and areas of interest.
Over the last 25 years, the understanding of the military operational environment has transformed from primarily a time and space-driven linear understanding (a "battlefield") to a multi-dimensional system of systems understanding (a battle-space). This system of systems understanding implies that managing the battle space has become more complex, primarily because of the increased importance of the cognitive domain, a direct result of the information age [Definitions].

Sources:

Battlespace. Definitions. Retrieved from: https://www.definitions.net/definition/battlespace

Battlespace. Collins English Dictionary. Retrieved from: https://www.collinsdictionary.com/dictionary/english/battlespace