Dahlgren's official Medal of Honor citation reads: He led the 3d Platoon to the rescue of a similar unit which had been surrounded in an enemy counterattack at Oberhoffen, France.
Running into a barn, he took up a position in a window and swept the hostile troops with submachine gun fire, killing 6, wounding others, and completely disorganizing the group.
He secured rifle grenades, stepped to an exposed position, and calmly launched his missiles from a difficult angle until he had destroyed the machinegun and killed its 2 operators.
Dahlgren entered the building, kicked open the cellar door, and, firing several bursts down the stairway, called for the trapped enemy to surrender.
Dahlgren in his heroic attacks were in a large measure responsible for repulsing an enemy counterattack and saving an American platoon from great danger.