The air over the Yellow Sea, that morning, smelled of brine and avgas. It was August 13, 1945. Forty-eight hours from the surrender. Above the muggy haze, in the cockpit of a Republic P-47N called Lil Meaties Meat Chopper, a 26-year-old lieutenant from El Paso watched five Japanese silhouettes drop out of the cloud and decided not to live the rest of his life wondering what he might have done.

His name was Oscar Francis Perdomo. He was the son of Mexican immigrants. He had a baby boy back home he had never met. By the time he landed back at Ie Shima, four hours and twenty minutes later, with the wet wing of his Thunderbolt sticky from oil blow-by and his canopy fogged with sweat, he had shot down five enemy aircraft in a single mission — and become the last American “ace in a day” of the Second World War, and, as it would turn out, the last one in U.S. history.

Nobody else has done it since. Nobody is likely to.

A boy from the border, a war in the Pacific

Perdomo grew up in El Paso in the Twenties, the kind of childhood where Spanish was spoken at the kitchen table and English was learned in the schoolyard. By the time he enlisted in 1943, he was already older than most of the cadets — twenty-four, married, working two jobs. The Army Air Forces sent him through flight school in Texas, then Florida, then Idaho, and finally to Ie Shima, a tiny coral island just off Okinawa that had been pried from the Japanese in three weeks of brutal fighting only a few months earlier.

The 464th Fighter Squadron was waiting for the invasion of Japan that everyone in the cockpit assumed was coming. The mission of August 13 was a 1,500-mile round trip up to Korea — a fighter sweep ahead of a planned bomber raid, the kind of mission only the P-47N, with its long-range wet wing, could actually fly.

Thirty-eight Thunderbolts crossed the Yellow Sea at altitude. Just inside the Korean coast, near a small airstrip outside what is now Seoul, they ran into roughly fifty Japanese aircraft staggered in two formations — Ki-84 Hayates above, and a stubby little K5Y “Willow” biplane trainer, of all things, somewhere in the mix.

Four hours, five kills

What happened next has been pieced together from gun-camera film, after-action reports, and the citation that would later land on Perdomo’s chest. He was an element leader, four ships out from the squadron lead, when the Japanese formation rolled into them. The first Ki-84 went down in a spiral he never pulled out of, set alight by a burst that converged on the nose and cockpit. The second died seconds later, the third in a tight turning fight that Perdomo somehow won despite the Thunderbolt’s reputation for sluggish stick at altitude.

The fourth Ki-84 he chased almost to the ground. The Willow — an unarmed trainer that had been pulled into the air in a final, panicked defense — he caught last, alone, and shot down at low level over a rice paddy. He had been in combat for less than fifteen minutes. He would never again fire a shot in anger.

Two days later, in Tokyo Bay, Emperor Hirohito’s voice cracked over a national radio broadcast that nobody outside the imperial household had ever heard before. The war was over. Perdomo flew home and almost nobody knew his name.

“For extraordinary heroism in connection with military operations against an armed enemy while serving as Pilot of a P-47 Fighter Airplane in the 464th Fighter Squadron, 507th Fighter Group, Twentieth Air Force, in aerial combat against enemy forces in the Southwest Pacific Area, on 13 August 1945.”

Distinguished Service Cross citation — 1st Lt. Oscar F. Perdomo, USAAF

The man who walked back into a quiet life

What is striking about Perdomo isn’t only what he did in the air. It’s what he did on the ground after. He came home to San Diego. He worked. He raised his kids. He let the rest of his life be the rest of his life. He gave one major interview in his entire postwar career. When local reporters tried to track him down on anniversaries of V-J Day, he politely declined to perform.

He flew with the Air Force Reserve through Korea and into the Sixties, retired as a major, and died in 1976 at the age of 57. The El Paso boy who came home with the Distinguished Service Cross became, again, simply a man who lived on a quiet street and took his coffee black. Modern fighters average maybe one kill per pilot per career. The era of the ace in a day died with him, and he barely noticed.

There is a particular American kind of greatness that hides itself the moment the war ends. Oscar Perdomo embodied it. Twenty-six years old, four hours over Korea, five confirmed silhouettes painted under his canopy — and then, mercifully, half a century of being nobody special. We should know his name. He almost certainly wouldn’t have wanted us to.

Sources: National WWII Museum, Texas State Historical Association, Hall of Valor (Military Times), San Diego Air & Space Museum (Perdomo Personal Papers), Wikipedia.