- Talk to Colonel Jourdan.
The Colonel has a plan to retake France. The first step is to clear Orly Internation Airport as it is a location of mild military importance. The quest requires that you kill 40 zombies at the airport.
- Kill 40 zombies at Orly International. You might need to make a second run to fill the kill counter.
- Return to Jourdan's Fort and meet with Colonel Jourdan to complete the quest.