The threshold command is used to specify the level of a given commodity which is to be maintained by the sector's distribution sector. These levels are maintained by either importing or exporting commodities. This importation and exportation is done automatically during an update. Both imports and exports from distribution sectors cost only one-half normal mobility.
c civilians m military u uncompensated workers f food s shells g guns p planes i iron ore d gold dust b bars of gold o oil l light construction materials h heavy construction materials r radioactive materials
and <THRESH> is a number specifying the level of commodity which is desired.