Napoleon commanded a thousand French troops, who defended themselves relying on the fortifications originally built by the Austrian army.
After an hour of fierce battle, the fortifications were badly damaged. Luckily, the destructive power of warfare was not so great at the time, and neither the solid shot from cannons nor the smaller projectiles from canister shot did much damage to the earthen structure that constituted the main body of the fortifications; only the surfaces were destroyed.
The barricades left by the Austrian army were barely sufficient.
As for the morale of the French Army, to be honest, the First Army under Napoleon was composed of veterans who had been battle-hardened over time. There were even core troops that had followed Anning since Conte's era, and a thousand of them were not afraid to face tens of thousands of Austrian troops.
