Final answer:
National security policies and achieving military objectives measure the target's importance to the adversary's target system and to a friendly force's ability to accomplish a mission or achieve an objective.
Step-by-step explanation:
The statement ___ measures the target's importance to the adversary's target system and to a friendly force's ability to accomplish a mission or achieve an objective, refers to an essential concept in Military Science, commonly discussed within national security policies and strategies.
The importance of a target is assessed in terms of how significantly it impacts both the adversary's system and the effective operation of friendly forces. In the military context, this importance translates to how the target's loss might impair the enemy’s capabilities or how its protection contributes to the success of a military objective. This concept aligns with the traditional view that military strength is a crucial element of national security.
In practical terms, the assessment of target importance involves analysis and maneuvers that can be both direct, as in the concentration of forces against a target, and indirect, affecting the target through other means, all with the objective of ensuring the friendly force can withstand the onslaught and remain unshaken in face of the enemy's attack as per the principles laid out in historic military strategies.