3rd Battalion, 321st Field Artillery Regiment, 18th Field Artillery Brigade brings the boom during Operation Thunderstruck Jan. 27-31 on Holland Drop Zone, Fort Bragg, N.C. 3-321 FAR tested their combat effectiveness and war fighting capabilities of their High Mobility Artillery Rocket System. Operation Thunderstruck qualified 3-321 FAR ability to rapidly and effectively deploy and sustain combat credible forces; it is a critical component to overall Army readiness and a strategic advantage over adversaries.