Which of the following is one of the four phases of the counterattack?

• A. Concentrate fire
• B. Seal off breakthroughs in the counterattack zone
• C. Hold key defense points to lock in gains
• D. Use multi-domain or multidirectional assault

Answer: (B)

One phase of a counterattack is to seal off breakthroughs in the counterattack zone. After an enemy breach, the priority is to prevent them from exploiting the gap or linking up with reserves. This phase concentrates forces to close the breach, block critical routes, and restore a cohesive front, setting up favorable conditions for the next steps of the counterattack.

Concentrating fire is a tactical action used during engagements, not a distinct phase. Holding key defense points to lock in gains describes stabilization after a setback rather than the specific phase of counterattacking. Using multi-domain or multidirectional assault refers to how the counterattack is executed rather than the phase itself.