9-18. The gathering of knowledge products continues throughout the MDMP. Staff officers carefully review the reference sections (located before paragraph 1. Situation) of the higher headquarters’ OPLANs and OPORDs to identify documents (such as theater policies and memoranda) related to the upcoming operation. If the MDMP occurs while in the process of replacing another unit, the staff begins collecting relevant documents—such as the current OPORD, branch plans, current assessments, operations and intelligence summaries, and SOPs—from that unit.