Phil in SF quoted The Sympathizer by Viet Thanh Nguyen
In this scene, a squad of suicidal guerrillas defiladed amid the tombs, whereupon Shamus would call down a white phosphorous strike on the sacred realm of the hamlet's ancestors, obliterating living and dead with 155 mm shells.
— The Sympathizer by Viet Thanh Nguyen (44%)
new vocabulary: defilade
noun: the protection of forces against enemy, observation or gunfire.
verb: protect (forces) against enemy observation or gunfire