raw material into usable resources, expressed as credits. The raw materials themselves, in games released before Red Alert 2 as well as Command & Conquer 3 require storage space in the form of refineries and, in the case of excess, "storage silo" structures. In Generals and Zero Hour, funds are collected by two methods: collection of supplies by specialised units and converted to money in "supply centers" or directly produced by specialised units, buildings, or tech buildings at a set interval of time.

All factions have structures and