The time is: 1630 hrs., 15 June 1815...The Imperial Guard light cavalry of Lefebvre-Desnottes encountered the Nassau infantry of Bernhard, Duke of Saxe-Weimar. The Duke had taken the initiative to move one of his two regiments south from the vital crossroads of Quatre-Bras, in the rolling countryside of Flanders, to delay the lead elements of the French advance. The French horsemen found the village of Frasnes occupied by a regiment of 1500 Orange-Nassau infantry. The Guard troopers began to ride around the town on both sides, threatening a double envelopment. Observing this, the Nassauers started to withdraw back up the road toward Waterloo.