In an OPLAN, which component contains the core concept and planning assumptions?

• A. Basic Plan
• B. Annexes
• C. Appendices
• D. Concept of Operations

Answer: (A)

The overarching approach to the operation and the initial planning assumptions are documented in the Basic Plan. This document sets the mission, objectives, and the general way the operation will be conducted, providing the framework that guides all subsequent planning. The concept of operations—the high-level method for how forces will achieve the objectives—and the planning assumptions are established here to shape the rest of the plan. Annexes and Appendices add detail for specific functions, but they derive from and follow the framework laid out in the Basic Plan rather than defining the overall approach. So the Basic Plan is where these foundational elements belong.