What is the main purpose of an Operation Order (OPORD)?

The primary purpose of an Operation Order (OPORD) is to provide detailed operational instructions. An OPORD communicates the who, what, when, where, and why of a specific operation to all relevant personnel, ensuring that everyone is aligned on the mission's objectives and the tasks they need to execute. This document lays out the plan comprehensively, covering aspects such as the intent of the commander, the situation, mission details, execution guidelines, and logistics, which are vital for effective operation planning and execution.

The other choices, while they touch on important topics, do not encapsulate the main function of an OPORD. Outlining future training events pertains more to training management than operational planning. Assessing the success of a previous mission is typically done through an After Action Review (AAR), which evaluates past performance rather than direct operational instructions for future missions. Requesting additional funding falls under resource management and is generally not within the purview of an OPORD, as it focuses predominantly on the coordination and direction of specific missions rather than financial matters.