The Green Zone (Arabic: المنطقة الخضراء, al-munṭaqah al-ḫaḍrā’) is the most common name for the International Zone of Baghdad. It is a 10-square-kilometre (3.9 sq mi) area in the Karkh district of central Baghdad, Iraq, that was the governmental center of the Coalition Provisional Authority and remains the center of the international presence in the city. Its official name beginning under the Iraqi Interim Government is the International Zone, though Green Zone remains the most commonly used term. The contrasting Red Zone refers to parts of Baghdad immediately outside the perimeter, but was also loosely applied to all unsecured areas outside the off-site military posts. Both terms originated as military designations.