While on the outskirts of the city, a group of multiple crews of sappers spotted some lines of Mexican infantry in the distance, and opened fire onto them with their cannons.
The whole city was alerted of their presence, and line infantry and Calvary were also sent out to the front to dispatch them.
Groups of cavalry immediately set out to meet their charge, and both groups collide in the middle of the field. Officers being rallying their line infantry, bugles blowing, and shots firing- reinforcements are two days late on their arrival- due to bad weather from their traverse in Monterrey. Cannons roar in the direction of the front of the city.
Cavalry primarily target other cavalry, while guerrilla infantry also target them.
Line infantry proceed on the frontier of the city.
Cannons and sappers target the demolition of the camps and sapper setups the French have.
Mexico, having it's funds stretched, is unable to pay for the expense of repairing infrastructure. Multiple conservative rebels rise from the dead ashes and proceed fighting garrisons in larger cities.