A Restrictive Fire Line is defined as:

• A. Line established between converging friendly forces that prohibits joint fires or their effects across that line
• B. Line used to indicate the boundary between sectors of fire for artillery
• C. A zone where fires are prohibited entirely
• D. A boundary to restrict movement of air assets

Answer: (A)

Restrictive Fire Lines are used to prevent fratricide when friendly forces converge. The line is drawn between those forces and prohibits joint fires or their effects crossing it, protecting troops from friendly fire while still letting fires be used on the near side to support the operation.

This is different from a boundary that only defines artillery sectors, which determines where fires can be aimed rather than stopping cross-traffic between converging units. It’s also not a blanket no-fire zone, which would prohibit all fires everywhere, nor is it a boundary concerned with air assets.