That morning the United States Eighth Air Force put 156 bombers in the air aimed at Bremen and Vegesack, escorted by more than 250 P-47 Thunderbolts. Hans Philipp, recently promoted to lieutenant colonel and now Geschwaderkommodore - wing commander - of Jagdgeschwader 1, took off at 14:11 with his wingman Hans-Gunther Reinhardt. The German fighters intercepted the bombers over the North Sea coast as the formation was heading home. Philipp closed on a straggling B-17, set it on fire at pointblank range, and pulled away under the formation. A rear gunner from another Flying Fortress caught him as he passed. He may also have been hit by a Thunderbolt flown by an American ace named Robert Johnson. The Fw 190 went into a dive. The last words Philipp transmitted on the radio were to his wingman: "Reinhardt, attack!"

Philipp tried to get the burning aircraft back to his airfield. He failed. At 15:45, somewhere between Hardenberg on the Dutch side and Itterbeck on the German side, near the village of Wielen in Lower Saxony, he bailed out at low altitude. The jump from roughly 50 meters - too low for the chute to fully deploy - killed him. His body was recovered the next day and examined in the field hospital at Rheine. The Eastern Front career that had brought him the great majority of his 206 claimed victories, that had brought him four mentions in the Wehrmachtbericht and the Knight's Cross with Oak Leaves and Swords personally awarded by Hitler at the Wolfsschanze, ended in a field where the cows are still grazing eighty years later.

Hans Philipp was born in Meissen in March 1917, the only child of a single mother named Alma. His biological father was a doctor in Plauen who paid alimony but did not publicly acknowledge the relationship because of the social codes of his profession. Alma worked as an accountant and clerk, scraped together the school fees, and pushed her son into a Realgymnasium where he could earn an Abitur. He joined the Hitler Youth as a teenager, volunteered for the Wehrmacht in 1936, trained as a pilot, and flew in the invasions of Poland, France, the Battle of Britain, the Balkans, and finally Operation Barbarossa. Most of his 206 claimed kills came on the Eastern Front. None of this absolves the cause he served. The Luftwaffe was an instrument of a regime that destroyed cities, murdered millions, and started a war that killed something like sixty million people. Philipp was very good at flying for it.

Four days before he died, Hermann Goring is reported to have issued an order to his fighter pilots: that any pilot returning from a mission without combat damage or a confirmed victory would face court-martial, and that any pilot who ran out of ammunition should ram the American bombers. Philipp's recorded response was not deferential. "As far as I'm concerned, I categorically refuse to allow myself to be held to such advice. I know what I have to do." There is no particular reason to read this as moral courage - he had been ill with appendicitis, he was exhausted from the air war over Germany, and the order was operationally absurd. But the line survives, and what it reveals is a senior officer who, in October 1943, no longer believed his own high command. Four days later he was dead.

The country around Wielen and Itterbeck is quiet farmland today, threaded with cycle paths and the slow brown Vechte river. The Vechte runs from Germany across the Dutch border into Hardenberg and beyond, indifferent to what happened above it. No monument marks Philipp's crash site that any tourist would find. He is one death among the dozens of pilots and aircrew - American, British, German, Dutch civilians on the ground - who fell into this same patch of low country during the bombing campaigns of 1943. The field is just a field. The story is one of the things flat farmland does well: it keeps almost no evidence of what once burned and fell into it.