Retrograde in History · 1843

Treaty of the Bogue

On October 8, 1843, Mercury was mid-loop — retrograde in Libra, tracing backward through 29°15′ of the sign.

WhenOctober 8, 1843♎︎Libra 29°15′Rx windowOct 3 – Oct 24, 1843
Mercury retrograde♎︎LibraWikipedia
The record

treaty between China and the United Kingdom, concluded in October 1843 to supplement the previous Treaty of Nanking

Coincidence, not causation: the date is real and ephemeris-based, but a retrograde window is observed, never blamed. For entertainment, not navigation.