How do Convoys work?
Convoys will usually work fine by clicking on automatic. If you want to manage them yourself: 1) the minimum number is set by the distance that the convoy has to travel 2) that minimum is doubled for supply convoys 3) if you meet the minimum, the number convoyed is 5 for each ticked off box 4) when you go beyond the minimum, each additional convoy carries 2x 5) You can verify the math by looking at the convoy details which will tell you how much has been shipped. 6) Convoys will continue until you have about 10 days supply stockpiled in that area. Convoys are then sent on an as needed basis.