A _____ is a number of targets and/or group(s) of targets planned to be fired in a predetermined sequence to support a maneuver operation.

The term that accurately describes a number of targets and/or groups of targets planned to be fired in a predetermined sequence to support a maneuver operation is a "Program of Targets." This terminology emphasizes a structured approach to target engagement, ensuring that fires are coordinated and effective as part of the overall operational plan.

In military operations, a Program of Targets allows for the synchronization of fire support, taking into account the timing, coordination with maneuver units, and the specific needs on the battlefield. By planning a sequence of engagements, commanders can maximize the impact of their fires and maintain tempo in the operation.

While "Series of Targets" may seem similar and could imply a sequence, it does not carry the same level of detail or organizational structure implied by "Program of Targets." A Program of Targets encompasses a broader concept that includes not just the sequence, but also the strategic planning behind the engagements. This makes it a more precise term for what is being described in the question.