When should an infantry squad initiate a breach?

An infantry squad should initiate a breach when they encounter an obstacle that impedes movement toward the enemy. This situation is critical because obstacles can range from natural terrain features like rivers or mountains to artificial barriers such as fences or walls. If these barriers prevent the squad from advancing or maneuvering effectively, breaching becomes necessary to maintain momentum and achieve mission objectives.

Successfully breaching an obstacle allows the squad to continue their advance toward the enemy, maintain pressure, and potentially exploit vulnerabilities in the enemy's defenses. The timing and execution of a breach must be carefully coordinated to ensure that the squad can transition from maneuvering to combat effectively, ensuring safety while minimizing the risk of becoming an easy target for enemy forces.

In this context, the other choices focus on scenarios that do not prioritize immediate action against obstacles that hinder movement. While communication, area security, and command orders are important considerations, the necessity to breach an obstacle arises from the immediate tactical need to overcome physical barriers to engagement with the enemy.