I don't know why you wouldn't be able to send supplies to gibraltar if you own it - unless the port has been damaged there?
As for vichy, when you're in Vichy territory, Vichy is responsible for supplying you - which is prolly why your troops can't stay suppled, because the supplies have to come from vichy, be transported via convoy, and then sent to your guys in Africa.
As for vichy, when you're in Vichy territory, Vichy is responsible for supplying you - which is prolly why your troops can't stay suppled, because the supplies have to come from vichy, be transported via convoy, and then sent to your guys in Africa.