What operational order outlines the details of a mission for a squad?

The operational order that outlines the details of a mission for a squad is the Operation Order (OPORD). An OPORD is a comprehensive document that provides detailed instructions for executing a specific operation. It includes sections on the situation, mission, execution, administration and logistics, and command and signal, ensuring that all personnel involved understand their roles and responsibilities clearly.

While a Fragmentary Order (FRAGO) is used to modify a previously issued OPORD, it does not serve as a stand-alone detailed outline of a new mission. A Movement Order (MOVORD) focuses specifically on the movement of troops and equipment and lacks the breadth of information provided in an OPORD. A Summary Order (SUMORD) is typically less detailed and might not include all the necessary components needed for a squad's mission execution. Hence, the OPORD is the most appropriate choice when looking for a comprehensive operational order that defines a mission.