I've achieved all the stars in the first three campaigns, but I can't get all stars on the first mission.
I have 13/15 stars. I destroyed the artillery unit in the South/South-West part of the map; rescued both the Americans and the Germans and obviously lead my units to the primary objective in the north. I still miss two stars though which means I probably need to trigger another secondary objective. Does anyone have a clue what it is? I have a save just before ending the mission, with a ton of units on my side, mostly cleaned up map and a ton of supplies. I just need to know what triggers that last objective.