What is essential to ensure before executing an EA according to the provided guidelines?

To effectively execute an engagement area (EA), it is crucial that every leader understands the plan. This understanding enables leaders at all levels to coordinate their actions, make informed decisions, and execute maneuvers that align with the overall intent of the operation. When leaders are well-versed in the plan, they can provide clear guidance to their subordinates and adapt to changing situations in the battlefield. This clarity reduces the risk of miscommunication and enhances the cohesion of the unit during the execution of the operation.

While the other options, such as completing reconnaissance, establishing communication, and ensuring supply logistics, are important components of operational planning, the comprehension of the plan by leaders is foundational. Without this understanding, even the best-laid plans can fail, as misalignments in execution may occur. Leaders who grasp the strategic objectives and tactical approaches can effectively synchronize their efforts to maximize the operational effectiveness of their units.