Final answer:
Operation Order is a directive issued by a leader to coordinate the execution of a specific military operation, involving ongoing actions, situation assessment, and strategy for sustaining operations.
Step-by-step explanation:
Operation Order is a term used in military operations to refer to a directive issued by a leader to his subordinates in order to effect the coordinated execution of a specific operation. It involves the planning and coordination of various actions and resources to achieve a specific objective. The ongoing actions during an operation, the assessment of the situation, and the strategy for sustaining operations are all part of the operation order.