Supply question

[Frumpy McDumpkins]

Can someone explain the supply mechanics to me? I don't remember it being this messed up in HOI2.
I have some marines sitting on guam in 1939 (US at peace) with a 28 transport supply convoy going to them, but every month the supplies go to 0 and the units are down to ~40 strength. I have to supply for offensive while they sit on the island just to get supplies back to them. The computer refuses to send supply convoys because "they don't need anything" even though they are 0.

[Stonedog]

here is a brief idea and I get you more in a few minutes my friend. hand full of bbq wings atm :)

’ll remind you here (although the details are presented later in the manual) that simply having supplies does not ensure that they will reach your troops. You will need to establish supply chains for that purpose and have sufficient transport capacity and infrastructure to ship goods along them. Unlike fuel, supplies are always consumed at their full daily rate.

[Stonedog]

As mentioned earlier, it is vital to ensure that you are supplying your military with a daily allotment of food and ammunition. This is withdrawn from your national stockpile of supplies and sent out to them along your supply chains. You can trade for supplies with other nations, but it is usually far more efficient to allocate IC to their manufacture. Whatever quantities you manufacture will be added to your national stockpile at a rate of three units of supplies for every unit of IC that you allocate. A warning though, having supplies in your national stockpile doesn’t mean that your armed forces will receive those supplies. The delivery of supplies depends entirely on whether your supply chains are intact and unimpeded, and on the effective supply efficiency in the provinces where your forces are located. This slider’s sole function is to manufacture and stockpile the necessary materials.

also... around page 27 or 28 where u want to look...

https://steamcdn-a.akamaihd.net/steam/apps/42850/manuals/AoD_Game_Manual_1.11.pdf?t=1603970134

[Frumpy McDumpkins]

Thanks for the reply!
So after a previous game, I figured some kind of chain would be needed for supply runs. So, Guam, Wake, and Pearl Harbor have max naval facilities (not sure what else counts as "infrastructure" for islands). I also MANUALLY created supply convoys to Wake and Guam (22 transports and 28 transports respectively). I'm at peace, so nothing is chipping away at my transports. According to that screen I currently have a surplus of transports (the marines are the only unit not in the continental US). The Marines on Wake (3 units) appear to be keeping up, but the ones on Guam (6 units) are at 46% and dropping. My IC sliders currently are at a surplus for supplies as well.
Does infrastructure actually matter on an island? Guam is at 70%...I wasn't sure so started building that too.

[Frumpy McDumpkins]

Your reply and reading the rule book again made me rethink my sliders and I figured it out. Thanks for your help!

[76561198814511849]

Originally posted by Frumpy McDumpkins:

Your reply and reading the rule book again made me rethink my sliders and I figured it out. Thanks for your help!

So you lacked the needed supplies for shipping in the first place?

If you have the needed supplies in the capital and the needed convoy transports, then supplying islands should not be hard, at least in the long run.

In the short run the registered need for supplies may be insufficient because the game only recognizes the ongoing supplyconsumption, but not the accumulated need from being low on supplies. In such an instance you will have the paradox situation that moving more supply consumers to the island can help. The best police is of course to not let supplies of divisions go much below 100% of their small stockpile in the first place.

On 1-province-islands infrastructure is unlikely to be the limiting factor. Infrastructure matters more deep inside of a continent.