Did you know the largest successful rescue mission of American airmen behind enemy lines during World War II remained hidden from the public for more than half a century?

In Gregory A. Freeman’s book, The Forgotten 500: The Untold Story of the Men Who Risked All for the Greatest Rescue Mission of World War II, readers learn the remarkable true story of Operation Halyard, a top-secret OSS mission that rescued more than 500 American bomber airmen who had been shot down over Eastern Europe and declared Missing in Action.

After bailing out of crippled B-24 Liberator bombers during bombing raids over Romania, the stranded airmen found an unexpected lifeline. Serbian civilians and resistance fighters, led by General Draža Mihailović, risked imprisonment and execution by hiding, feeding, and protecting the Americans from German forces.

Working together, the OSS and local resistance constructed a makeshift airstrip deep inside enemy territory. Under the cover of darkness, American C-47 transport aircraft landed and successfully evacuated the stranded airmen, making Operation Halyard one of the most extraordinary rescue missions of World War II.

Despite its success, the mission remained classified and was largely omitted from history for decades due to post-war political tensions. Freeman’s book helped bring long-overdue recognition to the courage and sacrifice of the American servicemen, OSS operatives, and Serbian civilians who made the rescue possible.

If you are looking for a fascinating World War II read, The Forgotten 500: The Untold Story of the Men Who Risked All for the Greatest Rescue Mission of World War II is an unforgettable account of heroism, resilience, and sacrifice.

At the Veterans History Museum, we are proud to share stories like Operation Halyard so these extraordinary acts of courage are never forgotten.