What is the primary purpose of military communications and information systems (CIS)?

The primary purpose of military communications and information systems (CIS) is to serve military operational needs. These systems are essential for facilitating real-time communication and information sharing among military units, ensuring effective command and control during operations. They support various military functions, including strategic planning, execution of missions, coordination of resources, and intelligence gathering. By prioritizing military-specific requirements, CIS plays a critical role in enabling situational awareness and operational effectiveness on the battlefield.

In contrast, options such as facilitating recreational communication, supporting civilian telecommunications, or enhancing foreign communications do not align with the core mission of military CIS, which is focused solely on the requirements of military operations and national defense.