The Xi’an Service (Pō’t.ōngp.ū), or Imperial Bureaucracy is a bureaucratic and military body made up of Xi’an aged 40 to 70. The backbone of the reigning Imperial House (Yii’uaTao”), the Service is compulsory for all Xi’an. It was created in the wake of the Xi’an Civil War (20044 - 19770 BCE) as a method to instill an overarching loyalty to the Imperial House and the Xi’an people rather than an individual Xi’an’s personal House of origin. While most return to their own Houses after their Service period ends, some elect to stay in the Service permanently.