August 17 in History

North Korean soldiers executed 42 American prisoners of war on a hillside above Waegwan, South Korea, binding their hands before shooting them during the chaotic early weeks of the Korean War. The massacre became one of the most documented war crimes of the conflict and fueled demands for stronger protections of prisoners under the Geneva Conventions.

Pope Eusebius was banished to Sicily by Emperor Maxentius in 309 CE, reportedly for trying to reconcile Christians who had renounced their faith during the persecutions with those who hadn't. The question of how to treat apostates who wanted back in tore the early Church apart. Eusebius may have died from a hunger strike in exile — the sources are unclear, but his papacy lasted only four months.

Samuel and Aron's Bulgarian forces crush the Byzantine army at the Gate of Trajan, compelling Emperor Basil II to flee for his life. This decisive victory shatters Byzantine control over Macedonia and secures Bulgarian dominance in the Balkans for decades, setting the stage for a prolonged struggle between the two empires.

Emperor Basil II walked into an ambush. A Bulgarian army under brothers Samuel and Aron destroyed his force at Trajan's Gate in 986, a mountain pass the Romans had cut through the Balkans centuries before. Byzantine soldiers died by the thousands. Basil barely escaped alive. He'd remember. Fifteen years later, he captured 15,000 Bulgarian prisoners and blinded 99 out of every 100. The hundredth man in each group got one eye left, so they could lead the rest home. Samuel is said to have died of shock when he saw them coming.

The Georgenberg Pact of 1186 merged Austria and Styria into a single political unit under the Babenberg dynasty. Duke Ottokar IV of Styria, childless and ill, signed his duchy over to Leopold V of Austria with the condition that the two territories remain undivided. The pact shaped Central European politics for centuries — Styria and Austria stayed linked through Habsburg rule until 1918.

Karl Topia, ruler of the Albanian princedom, forged an alliance with Venice in 1386, pledging military support in exchange for coastal defense against the Ottoman advance. The deal reflected the desperate calculations facing Balkan rulers as Ottoman power expanded westward. Venice wanted a buffer. Topia wanted survival. The Ottomans would eventually overwhelm both arrangements within a century.

The English crushed a larger French army at Verneuil in 1424, killing the Duke of Alencon's forces and their Scottish allies. John, Duke of Bedford, commanded the English side. The battle was called a second Agincourt — the longbow again proving devastating against mounted knights. Earl Archibald of Douglas, fighting for France, died on the field. The victory extended English control of northern France for another generation.

Konrad Bitz penned a preface to the Missale Aboense on August 17, 1488, creating the oldest known book printed in Finland. This volume preserved liturgical texts that shaped Finnish religious life for centuries and established a tangible literary foundation for the region's cultural identity.

Cesare Borgia became the first person in history to resign from the College of Cardinals in 1498. On the same day, King Louis XII of France named him Duke of Valentinois. Borgia traded spiritual power for temporal power with characteristic efficiency — he wanted armies, not absolution. Machiavelli would later use him as the model for The Prince.