When is a fragmentary order typically given?

A fragmentary order is typically issued to update an existing plan. In military operations, circumstances often change, requiring adjustments to previously established plans. The intent is to provide clarity and direction in light of new information or developments without the need to rewrite the entire operation order. This allows for a timely response to evolving situations, ensuring that personnel are informed about changes while maintaining operational continuity.

For instance, if new intelligence emerges that affects the timing or execution of an operation, a fragmentary order would succinctly integrate this new information into the operational framework. The focus is on flexibility and adaptability in a dynamic environment, which is critical in ground reconnaissance scenarios where conditions can shift rapidly.

Other options suggest scenarios that don't align with the typical purpose of a fragmentary order. Planning is generally a more structured process that precedes orders rather than being a purpose for fragmentary orders. Issuing fragmentary orders for new missions only would ignore their key role in modifying existing plans, and doing so after a mission has been executed would be redundant as the necessary tactical adjustments should be made before or during an ongoing operation.