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 kilometers (3.9 sq mi) area 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.
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 American 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 much anticipated heavy 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 and private contractors. Eventually some five thousand officials and civil contractors settled in the area.
The abandoned buildings were not only attractive to Coalition forces, but also to homeless Iraqis. Among these were individuals who had lost their homes in the conflict, but most were urban poor who had been homeless or lived in slums before the war and saw moving into the abandoned houses as a sizable increase in their standard of living. They felt that since they were not Ba'athist, they had as much right to the vacated houses as the Coalition authorities. There continue to be some five thousand of these Iraqis living in the Green Zone.
Entry to the Green Zone was under the control of a small garrison of American troops who manned the various checkpoints. They were typically a battalion of soldiers at FOB Prosperity, under the command of the Multi-National Division - Baghdad. Additionally, a battalion of coalition soldiers from the Republic of Georgia also manned the entry checkpoints.
The Green Zone was completely surrounded by high concrete blast walls, T-Walls and barbed wire fences with access only available through a handful of entry control points, all of which controlled by Coalition troops. It is this security that made the Green Zone the safest area of Baghdad, and gave its name colloquially as "the bubble". The southern and eastern side of the zone is protected by the Tigris River – the only entrance to the zone from this side is the Arbataash Tamuz (July 14) Bridge (named for the date that the former regime came to power.)
The Green Zone was frequently shelled by insurgents with mortars and rockets, though these attacks caused few casualties. In October 2004 it was hit by two suicide bombings, which destroyed the bazaar and the Green Zone Cafe. On April 12, 2007, a bomb went off in the Iraqi Parliament cafeteria, killing Mohammed Awad (a member of the Sunni National Dialogue Front) and injuring 22, including one of the vice presidents. The Green Zone was shelled with rocket and mortar fire almost daily from Easter 2008 until May 5, 2008, causing numerous civilian and military casualties; As stated in a USA Today Article  " A high percentage of the rocket and mortar fire originated in Sadr City. On April 6, 2008, two U.S. soldiers were killed and 17 more wounded when a rocket or mortar attack struck inside the Green Zone. On July 22, 2010, three Triple Canopy security guard contractors (two Ugandans and one Peruvian) were killed and 15 more wounded (including two U.S. nationals) when a rocket attack struck inside the Green Zone.
Since the handover of sovereignty to Iraqis, many of the facilities in the Green Zone have been turned over to the new Iraqi government. It is still a base for western private military contractors, and home to the U.S., British, Australian, and Egyptian embassies. The permanent U.S. embassy is located in the southern part of the International or "Green" Zone overlooking the Tigris River.
On 1 January 2009, full control of the International (formerly "Green") Zone was handed over to Iraqi security forces.
Notable sites in the Green Zone 
- Coalition Provisional Authority
- Al-Rashid Hotel
- Hands of Victory monument
- The Monument to the Unknown Soldier
- Green Zone Cafe (destroyed, reopened, closed)
- Green Zone Bazaar (destroyed)
- Assassin's Gate
- Ibn Sina Hospital
- Embassy of the United States in Baghdad
Unfinished addition to Baath Party Headquarters. Location of trial of Saddam Hussein
- Allawi, Ali (2007). The occupation of Iraq: winning the war, losing the peace. Yale University Press. p. 371. ISBN 978-0-300-11015-9.
- Johnson, Chalmers (2006). Nemesis: the last days of the American Republic. Metropolitan Books. p. 160. ISBN 978-0-8050-7911-1.
- Langewiesche, William (November 2004). Welcome to the Green Zone. The Atlantic.
- Dabrowska, Karen; Hann, Geoff (2008). Iraq Then and Now: A Guide to the Country and Its People. Bradt Travel Guides. p. 208. ISBN 978-1-84162-243-9.
- Filkins, Dexter (2009). The Forever War. Knopf Doubleday Publishing Group. p. 279. ISBN 978-0-307-27944-6.
- Nordland, Rod; Williams, Timothy (July 28, 2009). Iraq Force Soon to Be a Coalition of One. The New York Times.
- Baghdad Green Zone. GlobalSecurity.org.
- Lipman, Jana (2008). Guantánamo: A Working-Class History Between Empire and Revolution. University of California Press. p. 221
- Holihan, Michael (2007). The Epiphany Deception. Xulon Press. p. 74.
- Stone, Andrea (May 2, 2008). "Mortars, rockets raise Baghdad tensions". USA Today. Retrieved May 4, 2010.
- Londoño, Ernesto (January 1, 2009). "At Midnight, U.S. Leaves Republican Palace, Green Zone to Iraqis". The Washington Post. Retrieved 2009-08-23.