1600 19th August 1813
By mid afternoon of the first day allied cavalry patrols were reporting sightings of French at Aguillar and Castrillo. These reports were based on information supplied by local civilians and as they were obtained under duress must be treated as suspect.
No enemy had yet been sighted, but a contact could be expected before nightfall.
Much would now depend on the orders issued to the cavalry brigades.
If they were on move orders they would halt as soon as they sighted the enemy. They would not move close enough to determine the size or nationality of the enemy force. But they could confirm that there was an enemy presence
If they were on skirmish, engage or attack orders they would advance to make contact with the enemy. If it is a French cavalry brigade a skirmish will be fought. The loser will retire without any details of the enemy, other than the type of cavalry. The winner will be able to move close enough to determine the size and nationality of the enemy.
If they are on skirmish, engage or attack orders and they make contact with a full enemy division the cavalry will come under artillery fire. If they suffer casualties they will retire without any details of the enemy. If they do not suffer casualties they will advance to identify the size and nationality of the enemy, and will then retire to report.