Which type of minefield is used for protection against enemy breaches?

The correct answer is the defensive minefield, which is specifically designed to protect a given area from enemy forces. These minefields are strategically placed to halt or slow down an enemy's advance, creating a barrier that can disrupt their movements and inflict casualties. By employing a defensive minefield, military forces can enhance their overall security and defense, particularly in vulnerable locations.

In contrast, while a barrier minefield can also impede enemy movement, it often focuses on denying access to specific areas rather than serving as a dedicated protective measure. Nuisance minefields are intended to deter enemy forces through fear and uncertainty, but they do not provide robust protection against breaches. Phony minefields, on the other hand, are meant to mislead the enemy into believing there is a minefield present, which can create opportunities for deception in battle rather than direct protection. Understanding the function of a defensive minefield is crucial in military strategy, particularly when planning to safeguard friendly forces against potential breaches.