Final answer:
In most situations, secondary/follow-on responders should not move into an area occupied by friendly forces to prevent friendly fire incidents and confusion on the battlefield.
Step-by-step explanation:
In most situations, secondary/follow-on responders should not move into an area believed to be occupied by friendly forces. This is a basic principle of military tactics and is aimed at preventing friendly fire incidents and confusion on the battlefield. By avoiding areas where friendly forces are believed to be, secondary responders can ensure that they do not inadvertently engage friendly troops, causing unnecessary casualties and confusion.