What is the primary function of an "Operations Order" (OPORD)?

The primary function of an "Operations Order" (OPORD) is to provide detailed information and directives necessary for executing military operations. OPORDs serve as the foundational document that outlines the plan for a specific operation, detailing the objectives, the tasks assigned to different units, the timeline for execution, and the logistics required. This ensures that all involved parties understand the mission's intent and the specific actions they need to take to achieve success.

Within the structure of an OPORD, commanders can clearly communicate their intent, priorities, and the necessary coordination efforts with other units or supporting forces. The clear organization and specific details found in an OPORD are crucial for maintaining situational awareness and achieving operational effectiveness during complex missions.

Other choices describe functions that are not the primary focus of an OPORD. Tracking individual Marine performance, documenting personnel changes, and maintaining historical records of past operations are important aspects of military administration, but they do not pertain to the specific operational directives required for executing missions, which is the essence of an OPORD.