As I'm looking over the possibilities for Allied orders in the Tobruk region in the N. Africa 1941 scenario, I see a 1- roll yields a "Retreat" order, which means the units are to head toward the nearest Allied resupply placement area not held by the Axis. Cairo and Alexandria are listed as the places to roll for resupply placement; however, Fortress Tobruk also gets resupply units placed in it on a certain resupply die roll, so I am wondering if units in Tobruk region would retreat toward Cairo/Alexandria or retreat into Fortress Tobruk if it was held by the Allies? Both seem reasonable to me, so it's not obvious to me which is the intent of the design.

Has anyone encountered this situation before?

Thanks for any light that can be shed.