The Green Zone () is the most common name for the International Zone of Baghdad. It was a area in the Karkh district of central Baghdad, Iraq, that was the governmental center of the Coalition Provisional Authority during the occupation of Iraq after the American-led 2003 invasion and remains the center of the international presence in the city. Its official name beginning under the Iraqi Interim Government was 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. History The Green Zone was a heavily fortified zone in the center of the Iraqi capital that served as the headquarters of successive Iraqi regimes. It was the administrative center for the Ba'ath Party. The area was not originally home to the villas of government officials though it was the location of a number of military bases, government ministries, and presidential palaces inhabited by Saddam Hussein and his family. The largest of these was the Republican Palace that was President Saddam Hussein's primary seat of power. The area is also known as Karradat Mariam, so named for a locally famous woman who helped the poor people of Baghdad. The area was taken by US military forces in April 2003 in some of the heaviest fighting during the capture of Baghdad. In the lead-up to the US invasion of Iraq, Saddam and many high status residents of the area were evacuated because of the anticipated aerial bombardment of the area by US forces. Most of the remaining residents fled as US ground forces closed in on the Iraqi capital out of a fear of arrest by Coalition forces or possible reprisals by disgruntled Iraqis. Some of the original inhabitants who did not flee continued to live in the area but many are also undocumented squatters referred to as the "215 Apartments". Coalition airstrikes at the outset of the fighting left a sizable number of buildings in central Baghdad abandoned. The Coalition Provisional Authority administrators who arrived on the heels of the forward invading forces decided they were ideal for use by Coalition administrators. Jay Garner, head of the reconstruction team, set up his headquarters in the former Republican Palace; other villas were taken by groups of government officials