FRAGO
A FRAGO — Fragmentary Order — is a condensed military order that modifies or supplements a previously issued operation order (OPORD) without replacing it. It exists because combat operations change faster than the full order process can accommodate.
What It Is
Military operations are planned through a formal process that produces an OPORD — a complete, five-paragraph operation order covering situation, mission, execution, sustainment, and command and signal. OPORDs can run dozens of pages. They take time to produce, disseminate, and brief.
Once an OPORD is in effect, a FRAGO updates it in specific ways. Instead of issuing a new OPORD each time conditions change — which would be impractical under operational tempo — commanders issue FRAGOs that modify only the elements that have changed. Everything not addressed in the FRAGO remains as ordered in the original OPORD or previous FRAGOs.
A FRAGO uses the same five-paragraph structure as an OPORD but only populates the paragraphs that require changes. If the mission and situation are unchanged but the route of march has shifted, the FRAGO states the new route and notes that all other elements remain as ordered. Subordinate units integrate the FRAGO into their existing task organization and continue operations.
FRAGOs can be issued verbally in time-critical situations — a platoon leader calling a FRAGO over the radio to adjust a patrol route — or formally in written form for larger operations. In either case, the order is logged and tracked to maintain a clear operational record.
Etymology
“Fragmentary” reflects the partial, modifying nature of the order. It is a fragment of a complete order — addressing only what has changed rather than the whole picture. The abbreviation FRAGO is used universally across NATO militaries that follow U.S. doctrine, though equivalent concepts exist in other command systems.
A Concrete Example
A battalion is executing a raid based on an OPORD issued the previous evening. Intelligence received at 0300 indicates the target has moved from Building A to Building C in the same compound. The battalion commander issues a FRAGO to all subordinate units: the objective location changes, the breach point changes, and the exfil route adjusts accordingly. Mission, timeline, fire support arrangements, and command relationships remain as ordered. The assault element integrates the change and continues mission preparation.
Common Misconception
FRAGOs are sometimes described as “informal” orders because they are often delivered quickly and without the full OPORD apparatus. They are not informal. A FRAGO is a lawful order with the same authority as any other military directive. Failure to comply carries the same consequences as failure to comply with an OPORD. The “fragmentary” in the name refers to scope, not to authority or formality.