Which term refers to a command and control facility that oversees operations during a battle?

The term that refers to a command and control facility overseeing operations during a battle is "Command Post." A Command Post serves as the central location where commanders and their staff coordinate military operations, communicate orders, and manage resources. This facility is crucial for situational awareness, as it integrates various data sources to provide commanders with the information necessary to make informed decisions during a battle.

In a Command Post, personnel are equipped to execute strategic planning and direct forces, ensuring that different units are effectively working towards a common goal. It plays a pivotal role in enhancing command and control capabilities by consolidating command staff, operational staff, and communication systems, thereby facilitating the execution of missions and the management of resources.

The other options relate to different elements of military operations but do not serve as command and control facilities. For instance, "Secure (Tactical Mission Task)" refers more to a type of mission or objective rather than a physical location. "Air Defense Gun" and "Machine Gun (Light)" are specific weapon systems used in combat scenarios, not command facilities.