You now have aid from your squad as well as the Resistance, which makes this push forward a little easier. Use cover in the streets and advance on the disoriented Germans.
Switch to your Garand and attack the enemies as they pop out from the safety of cover. Your squad will automatically advance down the street as enemies are defeated. Follow closely, but let them take the point.
The battle eventually leads to a bridge defended by Germans. Fight across the bridge until a large contingent of German reinforcements arrives. Focus on killing the half-track machine gun operator, then turn your attention to the machine gunners on the ground level.
Objective: Rendezvous with Crowley
Follow Pierson as he leads your squad through the south gate to meet with Rousseau and Crowley. Crowley informs the squad of a counterattack. You need to clear the building in order to set up your defenses.
Objective: Clear the Building
Switch back to the Garand (or another weapon) and follow Crowley back inside the complex. Crowley hands over a Combat Shotgun and pops open a door. While the smoke grenade distracts the Germans, causing them to stumble around the room, use the newly acquired shotgun and mow them down with impunity. When the room is free of enemies, proceed to the second floor. The office is filled with Germans, but after killing a few of them, the rest will eventually surrender. Secure the prisoners.