Ace of Aces, also known as Bird of Prey, is a 1933 American pre-Code war film based on the story "The Bird of Prey" by World War I pilot John Monk Saunders that explores how war can turn a man's moral compass from pacifism to warmonger. Starring Richard Dix, it was similar to many of the period films that appeared to glorify the "knights of the air", but was more complex, examining the motivations of those who choose to go to war.