Box barrage is a military term which refers to an attack strategy in which the enemy is surrounded by a wall of fire. Synonyms for box barrage include fire curtain, hedgehog defense, and defensive wall. These terms are often used interchangeably in military jargon to describe the same type of attack formation. A fire curtain essentially refers to a wall of flames that obstructs the enemy's view and movement, while a hedgehog defense involves surrounding the enemy with multiple firing positions. A defensive wall, on the other hand, is a more general term that can refer to any form of barricade used to keep the enemy at bay.