Third Country National, the official US military term for citizens of nations other than the US and the local country. Mostly employees of
KBR and the other big contractors, most TCNs are Indian, Pakistani,
Bangladeshi, or Filipino, and do the majority of the menial labor on US bases throughout Iraq and Afghanistan. The specific title exists to make the important distinction between these contractors (who are indirectly employed by the US government) and direct
government employees on the one hand, and local nationals on the other.