When is a warning order best issued?

The best time to issue a warning order is upon receipt of a new mission. This is because a warning order serves as an initial notice to units that a mission is forthcoming. It allows troops to begin necessary preparations, such as gathering equipment, conducting reconnaissance, and organizing resources, without waiting for all the final details of the mission to be fully articulated. By issuing a warning order immediately upon receiving a new mission, leaders can ensure that everyone involved is aware that action is imminent, promoting a faster and more efficient response.

The other options highlight situations that could delay readiness. Issuing a warning order after the mission is finalized would not provide the necessary lead time for troops to prepare effectively. Waiting until sufficient information is available can cause delays, and issuing a warning only after all Marines are prepared might inhibit proactive planning and readiness, which is critical in tactical situations. Thus, the emphasis on immediate action and proactive preparation makes issuing a warning order upon receipt of a new mission the most effective practice.