When your army has been augmented with the reinforcements crossing over the pontoon bridge you’ve built, it’s time to secure the guard post to the north — but first use your HQ building to construct a few Bedford Repair trucks to take with you. The Nazis' anti-tank gun deals out major punishment, and there's no sense in losing units when all that would have saved them was a Repair Truck in the vicinity. The Pershings are best-suited for this, along with the Priests. When they’ve finished the task, team them up with a few extra Priests and perhaps a Matilda or two and repeat the process at the western and southern outposts.
Now it's time to find out what's happened to the fourth and final outpost — but the Nazis at the base to the northeast won't let you stroll in unescorted! Be ready for heavy Wurfrahmen attacks as you move. A good tactic is to place the Shermans and Pershings in the front rank, back them with several Bedford Repair trucks, followed by Priests in the rear and any Matildas on the flanks. The biggest threat will two AT88 Bunkers: focus on destroying them as soon as possible. Consider using the fast Matildas to draw the attention of the AT88 Bunkers as the Priests drop shells on them from a distance. With the Bunkers down, destroy everything except the Command Center and the Tank Factory: you can capture it and use it to produce Wurfrahmen, superior in range to your Calliope Sherman.
Above: You’ll run into plenty of Wurfrahmen as you advance eastward toward the Nazi base
At some point after capturing those two buildings, you'll receive a message to investigate a secret base in the south: as you go there you will destroy the Nazis at the last outpost. Be sure that Lynch is with the ground forces that destroy the secret base in order for you to achieve an objective.
Upon your arrival and subsequent victory, you'll discover a mysterious figure, a red-haired beauty who seems to think nothing of laughing in the midst of mayhem. There's no need to make a mental note of her face: you'll most definitely see her again!