Which key term lists military forces, units, and individuals temporarily grouped under one command for a specific operation or assignment?

The key term that refers to military forces, units, and individuals temporarily grouped under one command for a specific operation or assignment is known as "Task Force Organization." This concept is essential in military operations, as it enables the assembly of diverse resources and personnel with the specific objective of responding to a distinct mission or challenge.

When forces are organized as a task force, they retain their individual identities, yet they operate cohesively to achieve a common goal. This grouping allows for flexibility and agility in operations, ensuring that the right mix of capabilities can be deployed quickly to address a specific situation.

In contrast, the other terms mentioned have different meanings. The term about support refers to the type of assistance provided but does not specifically refer to the organizational structure. Operational Control involves authority over forces but does not define the temporary grouping itself. Meanwhile, a Personnel Accountability Report focuses on tracking personnel and does not pertain to the formation of units for operational purposes. Thus, "Task Force Organization" is the most accurate term for describing this unique military assembly for a particular assignment.