A solar eclipse halts a battle, the oldest event dated to the day
On this day · 28 May 585 BC
When day turned to night over their battlefield, the Lydians and Medes laid down arms, an eclipse now fixed to a single calendar day.
On 28 May 585 BC, a total solar eclipse swept across Anatolia as the armies of Lydia and the Medes clashed in the sixth year of their war. According to Herodotus, day abruptly turned to night; the awed soldiers stopped fighting and soon made peace, fixing the Halys River as their border.
The Greek thinker Thales of Miletus is said to have foretold the eclipse, possibly by tracking Babylonian cycles — if true, the earliest eclipse known to be predicted in advance.
Its deeper fame is calendrical: modern astronomy pins the only matching eclipse to a single day, making this the oldest historical event datable to an exact day.
Isaac Asimov called the prediction “the birth of science.”
Scholars still debate how — or whether — Thales truly predicted it, but the astronomical date itself is secure.
Sources & references
2 referencesWell-established. Corroborated by 2 independent sources.
