Director William Wyler lost his hearing during production of this film when he flew in a noisy, unpressurized transport plane. He was subsequently medically discharged from the Army, but eventually got some hearing back in one ear. Hence, the delay in the release of this film.
Filmed in 1944, not released until 1947.
Alto airfield (also known as Advanced Landing Ground 'Alto' and Alto Air Base) was a temporary airfield that formed part of the "USS Corsica" airbase complex on the east coast of Corsica. It was built in early 1944, and derived its name from the river that runs nearby, close to the village of Fovelli.