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

The term that describes military forces, units, and individuals temporarily grouped under one command for a specific operation or assignment is best identified as "Task Force Organization."

A task force is a specific grouping formed to accomplish a particular mission or operational goal. This grouping can include various branches of the military, specialized units, or support elements, all working cohesively under a unified command structure designed to achieve objectives efficiently during the timeframe of the operation.

Understanding 'Task Force Organization' in this context highlights its purpose in military operations, which is to ensure that all necessary resources are allocated effectively, enhancing coordination and strategic execution while operating in environments that may require swift adaptation and integration of diverse capabilities.