This is necessary because "high-level" strategic goals are often abstract, and therefore difficult to assess in terms of achievement without referring to some specific, often physical objectives.
For example:The complex and varied nature of the Vietnam War made it especially difficult to translate abstract, strategic goals into specific missions for individual organizations.
This occurred because of the economic change that saw the cost of the war escalate beyond the original predictions and the changing political leadership, which was no longer willing to commit to the conduct of the war, but also due to the radical change which United States society experienced during the war, and more importantly because:The American strategic goal was not the destruction of an organized military machine armed with tanks, planes, helicopters, and war ships, for which the United States had prepared, but the preservation of a fragile regime from the lightly armed attacks of both its own people and the North Vietnamese.
[9] The United States did not intend to conquer North Vietnam for fear of a Chinese or Soviet military reaction.
Likewise, the United States strategically assumed that the full extent of its power was not merited in the Vietnam War.