Which of the following is the best example of an operational phase objective?

An operational phase objective specifically relates to the clear and measurable goals that can be achieved during a particular phase of an operation. In the context of military operations, gaining air superiority in the battlespace is a direct, actionable goal that focuses on achieving control over the air domain. This objective is crucial because it impacts the overall success of the operation by enabling friendly forces to conduct operations without significant interference from enemy air assets.

Operational phase objectives are typically defined within a specific timeline and are geared toward immediate results that contribute to the overall mission. Gaining air superiority can significantly enhance the effectiveness of land and maritime forces and aid in the successful execution of both offensive and defensive operations.

The other options, while they are important components of broader military strategy and operational success, do not fit the specific criteria of operational phase objectives as well as gaining air superiority does. Establishing a military alliance is more of a strategic goal that could span the entire operation or be part of a larger campaign. Improving logistical capabilities is vital but tends to be more of a continual effort rather than a specific operational phase goal. Similarly, enhancing ground troop morale is important for the sustained effectiveness of forces but is not an objective that can be easily measured and achieved within the tight timeframe of tactical operations.