Home Videos DoD/Military/Pentagon VIDEO: Mortar live-fire exerciseVIDEO: Mortar live-fire exerciseNicholas HoffmanMarch 15, 2018DoD/Military/Pentagonhttps://www.youtube.com/watch?v=5hg-NNL8Zo4Soldiers from 3rd Squadron, 71st Cavalry Regiment,â send rounds down range during their mortar live-fire exercise here at Fort Drum, N.Y. Video by Staff Sgt. James Avery.Video of the Day