I have a few questions regarding blockading a port.
Using the below pic
1) If I have a ship at A and B, I assume the port is blockaded and the port 6 will become 5 the next turn (and then 4 and so on), correct?
2) If 1) is correct, what advantage does that provide me as the attacker?
3) If 1) is correct, does that affect the supply at Kalamata and Patras?
4) If there is an enemy unit at D, how do I go about starving it? Will the fact that my friendly unit at C is stopping the rails from providing support AS WELL AS the port blockade starve it out over X turns?
5) Assuming A and B have my ships and D is a friendly unit, will they still be getting supply from Kalamata or Patras? I assume yes BUT will that supply at both of those cities/town slowly degrade by 1 each turn (ie Kalamata from 6 to 5 to 4... and Patras from 4 to 3 to 2...)?

Thx
jonpfl