railroad expansion

His epic 'The Bridge on the River Kwai' explores the intersection of railroad/bridge construction, colonialism, and human determination during wartime expansion.

His Spaghetti Westerns, particularly 'Once Upon a Time in the West', center on railroad expansion as a symbol of civilization, progress, and conflict in the American frontier.

His Westerns like 'The Iron Horse' and 'My Darling Clementine' mythologize the railroad as a transformative force reshaping the American landscape and society.