During which step is a Combined Arms rehearsal typically conducted?

A Combined Arms rehearsal is typically conducted after the OPORD (Operations Order) is issued. This timing is critical as it allows all members of the unit to review and integrate their specific roles within the overall operation that has been planned and communicated through the OPORD. Conducting the rehearsal at this stage ensures that everyone is on the same page regarding the mission objectives, the commander's intent, and the coordination required among different arms of the military. It provides an opportunity to address any questions or concerns and refine planned actions, ensuring that all elements are prepared for execution when the time comes.

Rehearsals before the OPORD issuance would be premature since details of the operation are still being finalized, and the focus would not yet be on execution and coordination. Likewise, conducting a Combined Arms rehearsal at the mission's completion would not be practical, as it would miss the opportunity to identify and amend any issues before the operation takes place. Starting the rehearsal before mission planning begins would also be ineffective, as there would be no concrete details or plans to rehearse.