In late June 1944, during a strafing attack on a railway yard in the Po Valley in northern Italy, Smith was shot down by anti-aircraft fire. Parachuting from his aircraft, he landed without serious injury in the Ligurian Alps, in an area that was behind German lines, but largely under the control of anti-German Italian partisans. Smith spent three months working with the local resistance movement before trekking westwards, across the Maritime Alps, with three other Allied personnel, hoping to join up with the Allied forces that had just invaded southern France. After 23 days' hiking, he and his companions were recovered by American troops and repatriated.