The artillery would have been firing from battery positions well to the rear — far enough to be beyond direct-fire engagement range, using indirect fire calculated from map coordinates and adjusted by forward observers. The specific challenge in this case was adjusting fire close enough to be effective against the advancing Germans without hitting Murphy’s own position.
Artillery adjustment requires a process of walking rounds onto targets — firing a round, observing where it lands in relation to the target, calling an adjustment (up 100, left 50), firing another round, adjusting again. Under normal conditions, this requires clear communication and time. Under the conditions of January 26 — intermittent phone connectivity, smoke and noise from the burning M10, German infantry at fifty yards — it required something beyond normal conditions.
Murphy’s ability to direct artillery in these circumstances, while also firing his carbine at infantry and eventually climbing onto the burning tank destroyer to fire the .50-caliber, reflects a specific kind of military competence that infantry experience builds over time: the ability to maintain tactical situational awareness while operating under fire, to track multiple threats simultaneously, to communicate accurately despite the physical and psychological pressure of direct combat.
The citation credits approximately fifty German soldiers killed or wounded through the artillery direction and machine gun fire combined. This is the official credited account, not an independently verified modern count. What the number represents is the Army’s official assessment, at the time of the award, of the effect of Murphy’s actions on the attacking German force.