I have read the Wiki and several posts but am a little confused about something with supply. From what I understand, Supply is PRODUCED in both Cities and Depots...correct? So does that mean that I can build a depot smack dab in the middle of enemy territory and have it produce supplies even though it is not connected with a friendly supply producing territory? Does it, in this case, not produce enough supply because it does not have a route to a city?
If this is correct, what is the thought behind having a depot "build and produce" supplies as opposed to simply stoting them (and therefore needing to be linked to a city somehow)?