What type of Area of Operation do adjacent units share boundaries and the higher headquarters allocates to subordinate units?

The concept of an Area of Operation (AO) involves the geographical area assigned to a unit where it can conduct operations. When adjacent units share boundaries, it indicates that they have specific areas of responsibility that are next to one another without overlapping in function or authority. In a contiguous area of operation, one unit's boundary meets another's, allowing for a clear and organized plan for the command and control of forces operating in that territory.

This structure simplifies coordination and enhances operational effectiveness, as units can easily communicate and collaborate with each other while working within a defined area. The role of higher headquarters is to allocate these defined areas to subordinate units, ensuring that each unit knows its operational limits and responsibilities. This allocation supports mission success by reducing confusion and potential conflict between adjacent units working in the same general location.

In contrast, overlapping areas might create ambiguity regarding command authority and operational responsibilities. Likewise, exclusive areas would imply complete separation without shared boundaries, and divided areas typically suggest a more fragmented approach than contiguous operations. Thus, defining areas as contiguous allows for a more efficient and harmonious operational environment among adjacent units.