Final answer:
The term used by the military for a large, long-range objective broken down into projects is 'Megaproject'. These complex and resource-intensive initiatives can include large construction or defense system projects.
Step-by-step explanation:
The military term used to refer to an exceptionally large, long-range objective that is broken down into a set of projects is a) Megaproject. A megaproject is a very large investment project that is typically defined by its large scale and complexity, requiring the effective coordination of numerous related projects, and significant resources, and often has a substantial impact on the community, environment, and budget. Examples of megaprojects include the construction of airports, highways, and bridges, as well as military defense systems that may span over multiple years and involve a variety of stakeholders and extensive planning.