Retrograde in History · 1757
Battle of Kolín
On June 18, 1757, Mercury was mid-loop — retrograde in Cancer, tracing backward through 10°38′ of the sign.
WhenJune 18, 1757♋︎Cancer 10°38′Rx windowJun 14 – Jul 8, 1757
The record
On 18 June 1757, Frederick the Great’s 34,000 Prussian troops were defeated by 54,000 Austrians under Count von Daun at Kolín, forcing the Prussian king to abandon the Siege of Prague and retreat to Saxony.
Coincidence, not causation: the date is real and ephemeris-based, but a retrograde window is observed, never blamed. For entertainment, not navigation.