This has probably been answered somewhere a long time ago, but I have a problem. I'm playing as the UK, Germany has been beaten and most of Western Europe freed. I've been building up my military. I trade for around 100 supplies, so I have seldom had to devote much IC to supplies. All of the sudden, supply demand skyrockets and I can't tell from the tooltip why it's so high (sometimes allied usage shoots up, sometimes my own demand skyrockets, not sure why). Demand varies between 30 and 120 and then occasionally drops back down to manageable levels. I have very little IC available for supplies, and the 10-20 I can devote seldom seem to be enough and I keep getting down to 0 supplies. Nevertheless, my units all seem to be fully or nearly fully supplied. I do have units spread all over the empire, but the bulk of my high supply land units are in the UK, and my fleets are all in dock. Supply stockpiles are being maintained at the depot locations, but there's only around 2000 supplies there...not enough to account for all the missing supplies. Is this a bug?