While participating in combat at Firebase Tomahawk, Quang Nam Province, on March 1, 1969, he was killed in action — for his gallantry on this occasion, which saved the lives of three fellow Marines, he was awarded the Medal of Honor. He was on night watch when an enemy explosive was thrown at his position. He caught the charge, held it to his body, and ran from his position — away from fellow Marines who would have been killed by the explosion. Seconds later, the charge exploded and the full force of the blast was absorbed by Bruce, killing him instantly.