A '''Command''' (Tau: '''Uash'O''') is a grouping of all members of a particular [[Tau]] [[Caste]] of a given location; often this will be a planet or solar system. Likewise Commands are classified by their location and caste members, i.e. 'Air Caste Command [[Nimbosa]]'. For the Fire Caste, the most senior [[Tau Commander]] is placed in charge of a Command and may be referred to as High Commander.{{Fn|1}} The Commands of each of the four [[Caste]]s in a location make up a [[Coalition]]. {{Fn|2}}