William “Bill” McMillan marked a remarkable milestone on Dec. 19, celebrating his 103rd birthday and earning a place among the very small number of centenarians living in Wyoming. But his longevity is only part of what makes his story extraordinary.
McMillan also belongs to one of the most exclusive and rapidly disappearing groups in America: World War II veterans. Of the roughly 16.4 million Americans who served during the war, fewer than 45,000 are still alive today—less than half of one percent. As the youngest members of the Greatest Generation enter their late 90s, that number continues to shrink with each passing year.
McMillan’s service history reflects the defining moments of the 20th century. He survived World War II, answered the call again during the Korean War, and later served on a top-secret assignment with the Atomic Energy Commission. Each chapter of his life mirrors an era when duty and sacrifice shaped the nation.
At 103, McMillan remains an independent and living link to America’s past—a reminder that the stories of the Greatest Generation are not just history, but living legacies still among us.
There’s a lot more to this man’s story. Learn more about his life and service here. While you’re at it, check out some other hero highlights. Remember to check back with 82 & Up for the latest updates.