Final answer:
An airspace control measure (ACM) is a three-dimensional region that manages the integration of joint fires and airspace to ensure collaborative and safe military operations.
Step-by-step explanation:
The term you are looking for is airspace control measure (ACM). An airspace control measure is a three-dimensional area used to facilitate the integration of joint fires and airspace. It ensures the effective use of airspace without causing conflict among different elements that need to use it, which can include military aircraft operations, missile guidance, artillery fire, and even unmanned systems. By coordinating these activities within a designated area, ACM helps in preventing fratricide and ensures smooth operations during joint military efforts. An example of why this is necessary is during a military operation where aircraft and ground forces must operate in the same space without interfering with each other’s tasks. The creation of airspace control measures is a function often associated with bodies of combined military forces, such as those formed under treaties where member countries agree to mutual defense and operations integration, in the spirit of treating an attack on one as an attack on all, which fits with the concept of NATO, created in 1949.