Which military symbol often represents the headquarters?

The symbol that often represents headquarters in military operations is a solid rectangle. This symbol is used in military maps and diagrams to indicate the presence and function of a command location where higher-level leadership and staff coordinate activities. The solid rectangle's distinct shape helps differentiate it from other symbols used for various units or functions, making it clear to personnel where command authority resides. Understanding these symbols is crucial for effective communication and operational planning within a military context.