The Platoon director has joined a PETA campaign trying to get the army to stop the scheduled training drills in Fort Bragg, North Carolina. In the drills, over 3,000 goats are shot at and stabbed to simulate real-life combat.
In the video, Stone says: "As a veteran, I believe that those who are willing to fight for our country need the best possible training. Giving them a goat who was dismembered with hedge trimmers is not it.
"In the 21st century, there are more humane and effective ways to train service members than violently dismembering live animals."
Stone, who has served in the army, is urging officials to replace the animals with lifelike human simulators used by other army bases.
PETA recently came under fire for obesity adverts that were deemed "irresponsible" by health officials.
Watch Oliver Stone's PSA for PETA below (Warning - video contains graphic imagery which some users may find upsetting):