Which order is used to modify a previously issued OPORD?

• A. Warning Order (WARNORD)
• B. Fragmentary Order (FRAGO)
• C. OPORD
• D. Annex

Answer: (B)

A Fragmentary Order is used to modify a previously issued OPORD. It’s designed to deliver only the changes, additions, or removals from the original plan so units can adjust quickly without rewriting the entire order. A FRAGO typically lists the affected parts of the OPORD, states the new tasking, timing, and coordinating instructions, and shows when the changes take effect. It’s issued in response to evolving conditions—enemy actions, terrain or weather shifts, or updated resources—and it references the original OPORD to make clear what has changed. By contrast, a Warning Order starts the planning process before the full OPORD is issued, an OPORD is the complete original instruction, and an Annex is a detailed component of the OPORD rather than a mechanism to update it. So, for on-the-fly adjustments to the plan, a Fragmentary Order is the appropriate tool.