FM/BG-1522.V1.04 - Line of departure (LoD)
What a Line of Departure Is
- A Line of Departure (LoD) is the designated line where an assault or advance begins.
- It signals the transition from preparation or assembly to movement or attack.
The LoD is a control measure, not an objective. Crossing it initiates the operation.
When to Use
Most effective in:
- Deliberate assaults
- Platoon- or company-level attacks
- Coordinated multi-element movements
Generally unnecessary for small patrols or spontaneous actions.
Best Practices
- Anchor to recognizable terrain (road, ridgeline, tree line, or urban feature).
- Clearly define who crosses first and in what order.
- Ensure all support (fires, logistics, follow-on elements) is prepared before crossing.
- Tie crossing to a trigger (e.g., H-Hour or command order).
Communication
Keep reports concise:
- “1-1 crossing LoD.”
- “All elements set on LoD.”
Above: Example Line of departure location.
Last major change:
Initial Version
