What is a joint concept?

A joint concept is primarily viewed as a visualization of future military operations. It serves as a strategic framework that outlines how different branches of the armed forces might integrate and employ their capabilities to achieve a common objective in a future operational environment. This visualization is crucial for planning and exercises, as it helps leaders and planners consider how to effectively combine forces from various services to address complex military challenges.

In contrast, the other options touch on related topics but don't encapsulate the essence of what a joint concept represents. Describing operational effectiveness or summarizing past military engagements does not provide the forward-looking perspective inherent in a joint concept. Likewise, a list of military capabilities lacks the strategic visualization aspect, focusing instead on inventory rather than operational execution. Thus, option B is the most accurate description of what constitutes a joint concept.