| type | Activity |
| Label | Operational Environment Research |
| Documentation | |
| Reference | Joint Pub 3-56.1 page ix, III-3, III-4 |
| Aliases | |
| Definition | This phase is focused on gaining information about friendly and adversary capabilities and intentions, doctrine, and the environment in which the operations will take place. The goal of this phase is to gain an understanding of the theater of operations, the adversary, and friendly forces available to accomplich the JFC's objectives. |