Final answer:
The 'Nothing Showing' command is used when issues aren't initially apparent to first responders. It involves a cautious investigation. A tactical move to attack from the side instead of the front is known as a flanking maneuver.
Step-by-step explanation:
The command approach used when the problem is not obvious to the first-arriving unit is known as a Nothing Showing approach. This term refers to a situation where first responders arrive at a scene but do not immediately see evidence of a fire, emergency, or the specific problem that was reported. In such cases, a systematic and cautious investigation is initiated to identify any potential issues that might not be visible upon arrival. This cautious approach contrasts with Fast-attack operations where the problem is obvious, and immediate action is needed to control a scene, such as a visible fire or emergency situation.
Relating to the concept of military strategy, maneuvering around the side of an army, rather than attacking directly from the front, is known as a flanking maneuver. This tactic is used to gain a tactical advantage by attacking the enemy from the sides, where they are potentially more vulnerable or less defended.
The quote provided from Sun Tzu's "The Art of War" emphasizes the importance of coordination and communication in managing an army, regardless of its size, through effective use of signs and signals.