Sectarian violence in Iraq ( 2006 -- 08 ) - wikipedia Sectarian violence in Iraq ( 2006 -- 08 ) Sectarian Violence in Iraq ( 2006 - 2008 ) Part of the Iraq War ( 2003 -- 11 ), Iraqi insurgency ( 2003 -- 11 ) and the Iraq conflict ( 2003 -- present ) Ethnic and religious groups in Iraq : Shia Arabs Sunni Arabs Iraqi Kurds Iraqi Assyrians Iraqi Yazidis Iraqi Turkmen Date 22 February 2006 -- fall 2008 Location Central Iraq and Baghdad Result Tens of thousands of Iraqis killed 4 million people displaced U.S. Troop Surge in January 2007 Shi'a dominated governments formed after 2005 and 2010 elections Eventual improvements in public security Presence of British and American troops in advise and assist roles until 2011 Belligerents Sunni factions : Iraqi Ba'ath Party Loyalists Supreme Command for Jihad and Liberation Army of the Men of the Naqshbandi Order Ansar al - Sunna Islamic Army of Iraq Sunni tribes Other Sunni insurgents and militia Mujahideen Shura Council al - Qaeda in Iraq ( until October 2006 ) Islamic State of Iraq Shi'a factions : Mahdi Army Special Groups Asa'ib Ahl al - Haq Kata'ib Hezbollah Promised Day Brigades Badr Brigades Rogue elements among the Iraqi security forces Soldiers of Heaven Shia tribes Other militias Public stability : Iraqi security forces United States United Kingdom Other coalition forces Private Security Contractors Peshmerga Sons of Iraq Commanders and leaders Izzat Ibrahim ad - Douri Mohammed Younis al - Ahmed Abu Abdullah al - Shafi'i ( POW ) Fakri Hadi Gari ( POW ) Ishmael Jubouri Abu Omar al - Baghdadi † Abu Musab al - Zarqawi † Abu Ayyub al - Masri † Abu Suleiman Muqtada al - Sadr Abu Deraa Qais al - Khazali ( POW ) Akram al - Kabi Arkan Hasnawi † Mohammed Baqir al - Hakim † Abdul Aziz al - Hakim Hadi al - Amiri Abu Mustafa al - Sheibani Dia Abdul Zahra Kadim † Ahmed Hassani al - Yemeni † Jalal Talabani Ibrahim al - Jaafari Nouri al - Maliki Tommy Franks Massoud Barzani Abdul Sattar Abu Risha † Ahmad Abu Risha Strength Sunni Insurgents : 70,000 ( 2003 - 2007 ) Foreign Mujahedeen : 1,300 Mahdi Army : 60,000 ( 2003 -- 2008 ) Badr Organisation : 20,000 Soldiers of Heaven : 1,000 Special Groups : 7,000 ( 2011 ) Coalition ~ 49,700 current Contractors ~ 7,000 Iraqi Security Forces 618,000 ( 805,269 Army and 348,000 Police ) Awakening Council militias 103,000 N.B. : The factional situation is complex ; Sunni - and Shi'ite - linked militias have also fought amongst each other, and have colluded with government forces. Some casualties also linked to the crime activities and not due to the war. See the full text for details. Iraq War Timeline 2003 2005 2006 2007 2008 2009 2011 Invasion ( 2003 ) Umm Qasr Al Faw 1st Basra Nasiriyah Raid on Karbala Battle of Haditha Dam 1st Najaf Operation Airborne Dragon Northern Delay Viking Hammer Samawah 1st Karbala Al Kut Hillah Green Line Karbala Gap Baghdad Debecka Pass Kani Domlan Ridge Post-invasion insurgency ( 2003 -- 06 ) Al Anbar 1st Ramadan Red Dawn Spring 2004 Al Kut 1st Fallujah Sadr City 1st Ramadi Husaybah Danny Boy 2nd Najaf CIMIC - House Samarra 2nd Fallujah Mosul Lake Tharthar Al Qaim Hit Haditha Steel Curtain Tal Afar 2nd Ramadi Together Forward Diwaniya Sectarian violence ( 2006 - 08 ) 2nd Ramadan Sinbad Amarah Turki Diyala Haifa Street Karbala Raid 3rd Najaf Imposing Law U.K. bases Black Eagle Baghdad belts Baqubah Donkey Island Shurta Nasir Phantom Strike 2nd Karbala Phantom Phoenix Insurgency ( 2008 -- 11 ) 2008 Day of Ashura Ninawa Spring 2008 2nd Basra 2008 Al - Qaeda Offensive Augurs of Prosperity Abu Kamal Camp Ashraf Palm Grove US withdrawal violence Insurgent attacks of the Iraq War ‡ indicates attacks resulting in over 100 deaths § indicates the deadliest attack in the Iraq War This list only includes major attacks. 2003 1st Baghdad 2nd Baghdad Najaf 3rd Baghdad 1st Nasiriyah 1st Karbala ‡ 1st Erbil ‡ Ashoura 1st Basra Mosul ( 2004 ) 4th Baghdad 5th Baghdad Karbala - Najaf 1st Baqubah Kufa FOB Marez 2005 Suwaira bombing ‡ 1st Al Hillah 2nd Erbil ‡ Musayyib 6th Baghdad ‡ 7th Baghdad 1st Balad Khanaqin 2006 ‡ Karbala - Ramadi 1st Samarra 8th Baghdad 9th Baghdad ‡ 10th Baghdad 2007 11th Baghdad 12th Baghdad ‡ 13th Baghdad 14th Baghdad 15th Baghdad 2nd Al Hillah ‡ 1st Tal Afar 16th Baghdad 17th Baghdad 2nd & 3rd Karbala Mosul ( 2007 ) ‡ 18th Baghdad Makhmour Abu Sayda 2nd Samarra 19th Baghdad ‡ Amirli 1st Kirkuk 20th Baghdad 21st Baghdad § Qahtaniya Amarah 2008 22nd Baghdad 2nd Balad 23rd Baghdad 4th Karbala 24th Baghdad Karmah 2nd Baqubah Dujail Balad Ruz 2009 25th Baghdad 26th Baghdad Baghdad - Muqdadiyah Taza 27th Baghdad 2nd Kirkuk 2nd Tal Afar ‡ 28th Baghdad ‡ 29th Baghdad ‡ 30th Baghdad 31st Baghdad 32nd Baghdad 3rd Baqubah 33rd Baghdad 34th Baghdad 35th Baghdad ‡ 1st Pan-Iraq 36th Baghdad 37th Baghdad 2nd Pan-Iraq 38th Baghdad 39th Baghdad ‡ 40th Baghdad 2011 41st Baghdad ‡ 3rd Pan-Iraq Karbala - Baghdad 42nd Baghdad Tikrit 3rd Al Hillah 3rd Samarra Al Diwaniyah Taji 4th Pan-Iraq 43rd Baghdad 4th Karbala 44th Baghdad 2nd Basra 45th Baghdad Between 2006 and 2008, Iraq experienced a high level of sectarian violence. Some scholars and journalists state that the country was experiencing a civil war. Following the U.S. - launched 2003 invasion of Iraq, intercommunal violence between Iraqi Sunni and Shi'a factions became prevalent. In February 2006, the Sunni organization Al - Qaeda in Iraq bombed one of the holiest sites in Shi'a Islam - the al - Askari Mosque in Samarra. This set off a wave of Shi'a reprisals against Sunnis followed by Sunni counterattacks. The conflict escalated over the next several months until by 2007, the National Intelligence Estimate described the situation as having elements of a civil war. In 2008 and 2009, during the Sunni Awakening and the surge, violence declined dramatically. However, low - level strife continued to plague Iraq until the U.S. withdrawal in late 2011. Two polls of Americans conducted in 2006 found that between 65 % to 85 % believed Iraq was in a civil war ; however, a similar poll of Iraqis conducted in 2007 found that 61 % did not believe that they were in a civil war. In October 2006, the Office of the United Nations High Commissioner for Refugees ( UNHCR ) and the Iraqi government estimated that more than 370,000 Iraqis had been displaced since the 2006 bombing of the al - Askari Mosque, bringing the total number of Iraqi refugees to more than 1.6 million. By 2008, the UNHCR raised the estimate of refugees to a total of about 4.7 million ( ~ 16 % of the population ). The number of refugees estimated abroad was 2 million ( a number close to CIA projections ) and the number of internally displaced people was 2.7 million. The estimated number of orphans across Iraq has ranged from 400,000 ( according to the Baghdad Provincial Council ), to five million ( according to Iraq 's anti-corruption board ). A UN report from 2008 placed the number of orphans at about 870,000. The Red Cross stated in 2008 that Iraq 's humanitarian situation was among the most critical in the world, with millions of Iraqis forced to rely on insufficient and poor - quality water sources. According to the Failed States Index, produced by Foreign Policy magazine and the Fund for Peace, Iraq was one of the world 's top 5 unstable states from 2005 to 2008. A poll of top U.S. foreign policy experts conducted in 2007 showed that over the next 10 years, just 3 % of experts believed the U.S. would be able to rebuild Iraq into a `` beacon of democracy '' and 58 % of experts believed that Sunni -- Shiite tensions would dramatically increase in the Middle East. Contents 1 Ethno - sectarian composition 2 Participants 3 Conflict and tactics 3.1 Non-military targets 3.2 Bomb and mortar attacks 3.2. 1 Suicide bombings 3.3 Death squads 3.4 Attacks on places of worship 3.5 Sectarian desertions 4 Timeline 5 Growth in refugee flight 6 Use of `` civil war '' label 7 See also 7.1 Films 8 References 9 Bibliography 10 External links Ethno - sectarian composition Main article : Sectarian violence among Muslims The population of Iraq can be divided into several main ideological or ethnic strands : Shias ( Arabic speaking ) : 55 - 65 % : A majority of the population. Sunnis ( Arabic speaking ) : 20 % : Politically dominated Iraq for centuries until the Coalition invasion of 2003. Kurdish - 26 % : independent administration ( mostly Sunnis, small Shi'ite, Yazidi, and other elements ). Assyrian - 1 % : This group has a minor role in the current situation ( mostly Christians ). Turkoman - 2 % : This group has a minor role in the current situation ( majority Sunni with large Shi'a minority ), although Turkey is concerned about their overall treatment in Iraq. Religions : Islam - 95 % : This is the primary religion in Iraq and serves as one of the primary sectarian distinctions. Sunni - 30 % : Majority Arabs with Kurds and Turkomans by 3 to 1. Shi'ite - 65 % : Mainly Arabs with a very small minority of Kurds and Turkomans. Christian, Mandaeans and Yazidi ~ 5 % : These groups have a minor role in the civil war situation. The main two participants in the violence were the Arab Sunni and Arab Shia factions, but conflicts within a single group also occurred. The Kurds were caught between the two religious groups, but as they were an ethnicity as opposed to a religious movement, they were often at odds with the Arabs that were settled in Iraqi Kurdistan by Saddam 's Arabization policy. Blurring this cohesion, though, were division of social, economic, political and geographic identities. Participants Main articles : Al - Qaeda in Iraq, Iraqi insurgency ( Iraq War ), and Private militias in Iraq A multitude of groups formed the Iraqi insurgency, which arose in a piecemeal fashion as a reaction to local events, notably the realisation of the U.S. military 's inability to control Iraq. Beginning in 2005 the insurgent forces coalesced around several main factions, including the Islamic Army in Iraq and Ansar al - Sunna. Religious justification was used to support the political actions of these groups, as well as a marked adherence to Salafism, branding those against the jihad as non-believers. This approach played a role in the rise of sectarian violence. The U.S. military also believe that between 5 - 10 % of insurgent forces are non-Iraqi Arabs. Independent Shi'ite militias identified themselves around sectarian ideology and possessed various levels of influence and power. Some militias were founded in exile and returned to Iraq only after the toppling of Saddam Hussein, such as the Badr Organization. Others were created since the state collapse, the largest and most uniform of which was the Mahdi Army established by Moqtada al - Sadr and believed to have around 50,000 fighters. Conflict and tactics Non-military targets Attacks on non-military and civilian targets began in earnest in August 2003 as an attempt to sow chaos and sectarian discord. Iraqi casualties increased over the next several years. Bomb and mortar attacks Bomb attacks aimed at civilians usually targeted crowded places such as marketplaces and mosques in Shi'ite cities and districts. The bombings, which were sometimes co-ordinated, often inflicted extreme casualties. For example, the 23 November 2006 Sadr City bombings killed at least 215 people and injured hundreds more in the Sadr City district of Baghdad, sparking reprisal attacks, and the 3 February 2007 Baghdad market bombing killed at least 135 and injured more than 300. The co-ordinated 2 March 2004 Iraq Ashura bombings ( including car bombs, suicide bombers and mortar, grenade and rocket attacks ) killed at least 178 people and injured at least 500. Suicide bombings Main article : List of suicide bombings in Iraq since 2003 Since August 2003, suicide car bombs were increasingly used as weapons by Sunni militants, primarily al - Qaeda extremists. The car bombs, known in the military as vehicle - borne improvised explosive devices ( VBIEDs ), emerged as one of the militants ' most effective weapons, directed not only against civilian targets but also against Iraqi police stations and recruiting centers. These vehicle IEDs were often driven by the extremists from foreign Muslim countries with a history of militancy, such as Saudi Arabia, Algeria, Egypt, and Pakistan. Death squads Death squad - style killings in Iraq took place in a variety of ways. Kidnapping, followed by often extreme torture ( such as drilling holes in people 's feet with drills ) and execution - style killings, sometimes public ( in some cases, beheadings ), emerged as another tactic. In some cases, tapes of the execution were distributed for propaganda purposes. The bodies were usually dumped on a roadside or in other places, several at a time. There were also several relatively large - scale massacres, like the Hay al Jihad massacre in which some 40 Sunnis were killed in a response to the car bombing which killed a dozen Shi'ites. The death squads were often disgruntled Shi'ites, including members of the security forces, who killed Sunnis to avenge the consequences of the insurgency against the Shi'ite - dominated government. Iraq Body Count project data shows that 33 % of civilian deaths during the Iraq War resulted from execution after abduction or capture. These were overwhelmingly carried out by unknown actors including insurgents, sectarian militias and criminals. Such killings occurred much more frequently during the 2006 - 07 period of sectarian violence. Attacks on places of worship On 22 February 2006, a highly provocative explosion took place at the al - Askari Mosque in the Iraqi city of Samarra, one of the holiest sites in Shi'a Islam, believed to have been caused by a bomb planted by al - Qaeda in Iraq. Although no injuries occurred in the blast, the mosque was severely damaged and the bombing resulted in violence over the following days. Over 100 dead bodies with bullet holes were found on the next day, and at least 165 people are thought to have been killed. In the aftermath of this attack the U.S. military calculated that the average homicide rate in Baghdad tripled from 11 to 33 deaths per day. Dozens of Iraqi mosques were aftwerwards attacked or taken over by the sectarian forces. For example, a Sunni mosque was burnt in the southern Iraqi town of Haswa on 25 March 2007, in the revenge for the destruction of a Shia mosque in the town the previous day. In several cases, Christian churches were also attacked by the extremists. Later, another al - Askari bombing took place in June 2007. Iraq 's Christian minority also became a target by Al Qaeda Sunnis because of conflicting theological ideas. Sectarian desertions Some Iraqi service members deserted the military or the police and others refused to serve in hostile areas. For example, some members of one sect refused to serve in neighborhoods dominated by other sects. The ethnic Kurdish soldiers from northern Iraq, who were mostly Sunnis but not Arabs, were also reported to be deserting the army to avoid the civil strife in Baghdad. Timeline Main articles : 2003 in Iraq, 2004 in Iraq, 2005 in Iraq, 2006 in Iraq, 2007 in Iraq, 2008 in Iraq, 2009 in Iraq, 2010 in Iraq, and 2011 in Iraq For more information on events in a specific year, see the associated timeline page. Civilian deaths attributable to insurgent or military action in Iraq, and also to increased criminal violence. For the period between January 2006 and February 2008 as rendered by the Congressional Research Service for the Department of Defense. Many of these type of civilian deaths were not reported, and this image only reports from 2006 on. Other methods of estimating civilian deaths come up with much higher numbers. See also : Casualties of the conflict in Iraq since 2003. Growth in refugee flight Main article : Refugees of Iraq By 2008, the UNHCR raised the estimate of refugees to a total of about 4.7 million, with 2 million displaced internally and 2.7 million displaced externally. In April 2006 the Ministry of Displacement and Migration estimated that `` nearly 70,000 displaced Iraqis, especially from the capital, are living in deteriorating conditions, '' due to ongoing sectarian violence. Roughly 40 % of Iraq 's middle class is believed to have fled, the U.N. said. Most were fleeing systematic persecution and had no desire to return. Refugees were mired in poverty as they were generally barred from working in their host countries. A 25 May 2007 article noted that in the past seven months only 69 people from Iraq had been granted refugee status in the United States. Use of `` civil war '' label The use of the term `` civil war '' has been controversial, with a number of commentators preferring the term `` civil conflict ''. A poll of over 5,000 Iraqi nationals found that 27 % of polled Iraqi residents agreed that Iraq was in a civil war, while 61 % thought Iraq was not. Two similar polls of Americans conducted in 2006 found that between 65 % to 85 % believed Iraq was in a civil war. In the United States, the term has been politicized. Deputy leader of the United States Senate, Dick Durbin, referred to `` this civil war in Iraq '' in a criticism of George W. Bush 's 10 January 2007, President 's Address to the Nation. Edward Wong on 26 November 2006 paraphrased a report from a group of American professors at Stanford University that the insurgency in Iraq amounted to the classic definition of a civil war. An unclassified summary of the 90 - page January 2007 National Intelligence Estimate, titled Prospects for Iraq 's Stability : A Challenging Road Ahead, states the following regarding the use of the term `` civil war '' : The Intelligence Community judges that the term `` civil war '' does not adequately capture the complexity of the conflict in Iraq, which includes extensive Shia - on - Shia violence, al - Qa'ida and Sunni insurgent attacks on Coalition forces, and widespread criminally motivated violence. Nonetheless, the term `` civil war '' accurately describes key elements of the Iraqi conflict, including the hardening of ethno - sectarian identities, a sea change in the character of the violence, ethno - sectarian mobilization, and population displacements. Retired United States Army General Barry McCaffrey issued a report on 26 March 2007, after a trip and analysis of the situation in Iraq. The report labeled the situation a `` low - grade civil war. '' In page 3 of the report, he writes that : `` Iraq is ripped by a low - grade civil war which has worsened to catastrophic levels with as many as 3000 citizens murdered per month. The population is in despair. Life in many of the urban areas is now desperate. A handful of foreign fighter ( 500 + ) -- and a couple thousand Al Qaeda operatives incite open factional struggle through suicide bombings which target Shia holy places and innocent civilians... The police force is feared as a Shia militia in uniform which is responsible for thousands of extra-judicial killings. '' See also Iraq portal Casualties of the conflict in Iraq since 2003 Historical Shi'a - Sunni relations Iraqi insurgency Post-invasion Iraq, 2003 -- present Refugees of Iraq Events : 2 March 2004 Iraq Ashura bombings 23 November 2006 Sadr City bombings 22 January 2007 Baghdad bombings 3 February 2007 Baghdad market bombing Hay al Jihad massacre General : Ethnic cleansing Ethnic conflict Sectarianism Religion in Iraq Religious war Films Iraq in Fragments, documentary ( 2006 ) References Jump up ^ `` U.K. Finishes Withdrawal of Its Last Combat Troops in Iraq ''. Bloomberg. 26 May 2009. Jump up ^ `` Iraq Government Vows to Disband Sunnis ''. Retrieved 20 November 2014. Jump up ^ Anthony H. Cordesman ( 2011 ), `` Iraq : Patterns of Violence, Casualty Trends and Emerging Security Threats '', p. 33. Jump up ^ Iraq Body Count. Retrieved 18 September 2007. Jump up ^ International Crisis Group : `` Iraq 's Civil War, the Sadrists and the Surge ''. Released on 7 February 2008. The Costs of Containing Iran. Nasr, Vali and Takeyh, Ray ( Jan / Feb 2008 ). to preserve the territorial integrity of Iraq and prevent the civil war there from engulfing the Middle East. International Crisis Group : `` Iraq after the Surge I : The New Sunni Landscape ''. Released on 30 April 2008. Jump up ^ The Brookings Institution Iraq Index : Tracking Variables of Reconstruction & Security in Post-Saddam Iraq. 1 October 2007 Jump up ^ Pincus, Walter ( 17 November 2006 ). `` Violence in Iraq Called Increasingly Complex ''. The Washington Post. Retrieved 30 April 2010. Jump up ^ Ricks, Thomas E. `` Intensified Combat on Streets Likely ''. The Washington Post. Retrieved 30 April 2010. Jump up ^ Page 2 Jump up ^ `` Using that self aggrandizing, self appointed title, al Hassan built up a force of a thousand men '' The Hidden Imam 's Dream - Sky News, 30 January 2007 Jump up ^ `` June deadliest month for U.S. troops in 2 years ''. USATODAY.COM. Retrieved 20 November 2014. Jump up ^ `` Private contractors outnumber U.S. troops in Iraq ''. By T. Christian Miller. Los Angeles Times. 4 July 2007. Jump up ^ `` Contractor deaths add up in Iraq ''. By Michelle Roberts. Deseret Morning News. 24 February 2007. Jump up ^ Collins, C. ( 19 August 2007 ) `` U.S. says Iranians train Iraqi insurgents, '' McClatchy Newspapers Jump up ^ `` A Dark Side to Iraq ' Awakening ' Groups ''. Retrieved 20 November 2014. ^ Jump up to : `` Car Bomb Epidemic Is the New Normal in Iraq ''. New York Times. 3 September 2013. Jump up ^ Kenneth Katzman ( 2009 ). Iraq : Post-Saddam Governance and Security. Congressional Research Service. p. 29. ISBN 9781437919448. Jump up ^ `` Elements of ' civil war ' in Iraq ''. BBC News. 2 February 2007. Retrieved 2 January 2010. A US intelligence assessment on Iraq says `` civil war '' accurately describes certain aspects of the conflict, including intense sectarian violence. Jump up ^ `` Iraq : Patterns of Violence, Casualty Trends and Emerging Security Threats '' ( PDF ). Center for Strategic & International Studies. 9 February 2011. p. 14. Retrieved 13 October 2013. Jump up ^ Kenneth Pollack ( July 2013 ). `` The File and Rise and Fall of Iraq '' ( PDF ). Brookings Institution. Retrieved 13 October 2013. ^ Jump up to : `` Poll : Nearly two - thirds of Americans say Iraq in civil war ''. Retrieved 20 November 2014. ^ Jump up to : 12 / 06 CBS : 85 % of Americans now characterize the situation in Iraq as a Civil War ^ Jump up to : Colvin, Marie ( 18 March 2007 ). `` Iraqis : life is getting better ''. London : The Times. Retrieved 30 April 2010. ( ) Jump up ^ United Nations High Commissioner for Refugees. `` Office of the United Nations High Commissioner for Refugees ''. UNHCR. Retrieved 20 November 2014. Jump up ^ `` CIA World Factbook : Iraq ''. Retrieved 20 November 2014. ^ Jump up to : UNHCR - Iraq : Latest return survey shows few intending to go home soon. Published 29 April 2008. Retrieved 20 May 2008. Jump up ^ 5 million Iraqi orphans, anti-corruption board reveals English translation of Aswat Al Iraq newspaper 15 December 2007 Jump up ^ `` '' Draft law seeks to provide Iraqi orphans with comprehensive support '' by Khalid al - Tale, 27 March 2012 ``. Mawtani. 27 March 2012. Retrieved 20 November 2014. Jump up ^ `` Iraq : No let - up in the humanitarian crisis ''. Retrieved 20 November 2014. Jump up ^ `` Failed States list 2005 ''. Fund for Peace. Retrieved 24 June 2008. `` Failed States list 2006 ''. Fund for Peace. Retrieved 24 June 2008. `` Failed States list 2007 ''. Fund for Peace. Retrieved 19 June 2007. `` Failed States list 2008 ''. Fund for Peace. Retrieved 24 June 2008. Jump up ^ U.S. foreign policy experts oppose surge Jump up ^ Foreign Policy : Terrorism Survey III ( Final Results ) Jump up ^ `` US exit may lead to Iraqi civil war ''. 19 November 2003 ^ Jump up to : Dodge, Toby ( 2007 ). `` The Causes of US Failure in Iraq ''. Survival. 49 ( 1 ) : 85 -- 106. doi : 10.1080 / 00396330701254545. Jump up ^ `` In Their Own Words : Reading the Iraqi Insurgency ''. International Crisis Group. 15 February 2006. Jump up ^ Meijer, Roel. `` The Sunni Resistance and the Political Process ''. In Bouillion, Markus ; Malone, David ; Rowsell, Ben. Preventing Another Generation of Conflict. Lynne Rienner. Jump up ^ Administrative User ( 7 January 2013 ). `` Johns Hopkins School of Public Health : Iraqi Civilian Deaths Increase Dramatically After Invasion ''. Johns Hopkins Bloomberg School of Public Health. Retrieved 20 November 2014. Jump up ^ Max Boot ( 3 May 2008 ). `` Wall Street Journal : The Truth About Iraq 's Casualty Count ''. WSJ. Retrieved 20 November 2014. Jump up ^ AFP : Bomb attack kills more than 40 near Iraq Shiite shrine Jump up ^ `` CNN : Pair of bombs kills 53 in Baghdad, officials say ''. Retrieved 20 November 2014. Jump up ^ Bradley Graham ( 9 May 2005 ). `` U.S. Shifting Focus to Foreign Fighters '' ( PDF ). Washington Post. Retrieved 13 October 2013. U.S. and Iraqi authorities say suicide drivers are invariable foreign fighters. Officers here said they knew of no documented case in which a suicide attacker turned out to have been an Iraqi. Jump up ^ http://www.timesonline.co.uk/tol/news/world/article737635.ece Jump up ^ `` Iraq ' death squad caught in act ' ''. BBC. 16 February 2006. Retrieved 13 December 2013. Jump up ^ The Weapons That Kill Civilians -- Deaths of Children and Noncombatants in Iraq, 2003 -- 2008 by Madelyn Hsiao - Rei Hicks, M.D., M.R.C. Psych., Hamit Dardagan, Gabriela Guerrero Serdán, M.A., Peter M. Bagnall, M. Res., John A. Sloboda, Ph. D., F.B.A., and Michael Spagat, Ph. D. The New England Journal of Medicine Jump up ^ `` Al Jazeera English - News - Iraq Mosque Burnt In Revenge Attack ''. Al Jazeera English. Retrieved 20 November 2014. Jump up ^ `` BBC Analysis : Iraq 's Christians under attack ''. Retrieved 20 November 2014. Jump up ^ http://www.thenational.ae/apps/pbcs.dll/article?AID=/20100320/MAGAZINE/703199980/1298/MAGAZINE1 ^ Jump up to : Former CIA Officer Says Iraq Can Be Stabilized By Trained Security Forces PBS Jump up ^ `` Kurdish Iraqi Soldiers Are Deserting to Avoid the Conflict in Baghdad ''. Retrieved 20 November 2014. Jump up ^ John Pike. `` IRAQ : Sectarian violence continues to spur displacement ''. Retrieved 20 November 2014. Jump up ^ `` 40 % of middle class believed to have fled crumbling nation ''. SFGate. Retrieved 20 November 2014. Jump up ^ `` Doors closing on fleeing Iraqis ''. Retrieved 20 November 2014. Jump up ^ `` Displaced Iraqis running out of cash, and prices are rising ''. SFGate. Retrieved 20 November 2014. Jump up ^ Ann McFeatters : Iraq refugees find no refuge in America. Seattle Post-Intelligencer 25 May 2007 Jump up ^ Susan Milligan, `` Democrats say they will force lawmakers to vote on increase ''. 11 July 2006 Jump up ^ `` President 's Address to the Nation ''. 10 January 2007. Retrieved 20 November 2014. Jump up ^ Wong, Edward ( 26 November 2006 ). `` Scholars agree Iraq meets definition of ' civil war ' ''. The New York Times. International Herald Tribune. Jump up ^ `` Prospects for Iraq 's Stability : A Challenging Road Ahead ( PDF ) '' ( PDF ). National Intelligence Estimate. January 2007. Jump up ^ http://www.defensetech.org/archives/Iraq%20After%20action.pdf Bibliography Iraq Study Group, The Iraq Study Group Report : The Way Forward - A New Approach ( 2006 ) Nir Rosen, In the Belly of the Green Bird : The Triumph of the Martyrs in Iraq ( 2006 ) External links Refugees Report `` The Iraqi Displacement Crisis '' March 2008. United States Dept. of Homeland Security Fact Sheet on admitting Iraqi refugees to the United States March 2008. Sami Ramadani interview `` Iraq is not a civil war '' Spring 2007. Taheri, Amir. `` There is no Civil War in Iraq, Gulf News, 6 December 2006. Phillips, David L., `` Federalism can prevent Iraq civil war '', 20 July 2005. Hider, James, `` Weekend of slaughter propels Iraq towards all - out civil war '', 18 July 2005. Ramadani, Sami, `` Occupation and Civil War '', UK Guardian, 8 July 2005. Phelps, Timothy M., `` Experts : Iraq Verges on Civil War ''. Newsday, 12 May 2005. Strobel, Warren P., and Jonathan S. Landay, `` CIA Officers Warn of Iraq Civil War, Contradicting Bush 's Optimism '', Knight - Ridder, 22 January 2004. `` US exit may lead to Iraqi civil war '', 19 November 2003. Dunnigan, James, `` The Coming Iraqi Civil War '', 4 April 2003 Iraq War ( 2003 -- 2011 ) Background Lead - up Disarmament crisis Yellowcake uranium WMD claims Rationale US popular opinion Hussein interview Biological weapons Invasion Failed Iraqi peace initiatives Preparations Multi-National Force Timeline Battle of Nasiriyah Invasion of Baghdad Debecka Pass Firdos Square statue Mission Accomplished speech Post-war WMD conjecture Coalition Provisional Authority Key events Invasion ( 2003 ) Execution of Saddam Hussein ( 2006 ) Anbar Province ( 2003 -- 11 ) Insurgency ( 2003 -- 11 ) Post-invasion insurgency ( 2003 -- 06 ) Sectarian violence ( 2006 -- 08 ) U.S. withdrawal ( 2007 -- 11 ) Aftermath Post-withdrawal insurgency ( 2011 -- 13 ) Military intervention against ISIL ( 2014 -- present ) Iraqi Civil War ( 2014 -- present ) Reactions Views on the invasion Legitimacy of the invasion Opposition Protests Criticism United Nations Governmental positions Controversies Baghdad Museum looting ( 2003 ) Fallujah genocide ( 2003 ) Abu Ghraib prisoner abuse ( 2004 ) Mukaradeeb wedding party massacre ( 2004 ) Haditha massacre ( 2005 ) Mahmudiyah rape and killings ( 2006 ) Ishaqi incident ( 2006 ) Baghdad airstrike ( 2007 ) Nisour Square massacre ( 2007 ) Iraq War documents leak ( 2010 ) Impact Refugees Duelfer Report Damage to Baghdad Iraq Interim Governing Council Aid and Investment Economic reform Financial cost Casualties Chilcot Inquiry Human rights Memorials London Lists Coalition military operations Bombings Aviation shootdowns and accidents Associated people Timeline 2003 2005 2006 2007 2008 2009 2011 Wikinews Multimedia Armed groups in the Iraq conflict ( 2003 -- present ) Iraqi government Iraqi Armed Forces Iraqi Army Iraqi Air Force Iraqi Police Iraqi Police Service National Police Supporting Forces Facilities Protection Service Ba'athists Army of the Men of the Naqshbandi Order Fedayeen Saddam General Military Council for Iraqi Revolutionaries Al - Awda General Command of the Armed Forces, Resistance and Liberation in Iraq Popular Army New Return Patriotic Front Political Media Organ of the Ba'ath Party Popular Resistance for the Liberation of Iraq Al - Abud Network Militias and others Shia Islamic militias Mahdi Army Abu Deraa 's Mahdi Army faction Badr Organization Sheibani Network Soldiers of Heaven Special Groups ( Iraq ) Asa'ib Ahl al - Haq Promised Day Brigade Kata'ib Hezbollah Sunni Islamic militias Awakening groups 1920 Revolution Brigade Jaish al - Rashideen Islamic Army in Iraq Islamic Front for the Iraqi Resistance Hamas of Iraq Kurdish militias Peshmerga Kurdistan Workers ' Party Kurdistan Freedom Hawks Kurdistan Free Life Party Turkmen militias Iraqi Turkmen Front 16Brigade 52nd Brigade 92nd Brigade Brigade of Imam Hussein Sayyid al - Shuhada Bashir Regiment Assyrian militias Qaraqosh Protection Committee Nineveh Plain Forces Nineveh Plain Protection Units Dwekh Nawsha Syriac Military Council Kataib Rouh Allah Issa Ibn Miriam Yazidi militias Asayîşa Êzîdxanê Êzîdxan Protection Force Sinjar Alliance Sinjar Resistance Units Êzîdxan Women 's Units Insurgents Nationalist Salafis Mujahideen Army Mujahideen Battalions of the Salafi Group of Iraq Islamic Salafist Boy Scout Battalions Mohammad 's Army Salafi Jihadists Ansar al - Islam Black Banner Organization Abu Theeb 's group Jaish Abi Baker 's group Jamaat Ansar al - Sunna Islamic State of Iraq and the Levant Mujahideen Shura Council Tanzim Qaidat al - Jihad fi Bilad al - Rafidayn Jama'at al - Tawhid wal - Jihad Wakefulness and Holy War Retrieved from `` https://en.wikipedia.org/w/index.php?title=Sectarian_violence_in_Iraq_(2006 -- 08 ) &oldid = 811675848 '' Categories : 2004 in Iraq 2005 in Iraq 2006 in Iraq 2007 in Iraq 2008 in Iraq Iraq War Al - Qaeda activities in Iraq Iraqi insurgency ( 2003 -- 11 ) Occupation of Iraq Politics of Iraq Religiously motivated violence in Iraq Civil wars in Iraq Civil wars post-1945 Religion - based civil wars Wars involving Iraq Violence against Muslims Hidden categories : Wikipedia articles needing page number citations from April 2013 Articles needing more detailed references Use dmy dates from May 2016 Pages using military navigation subgroups without wide style Talk Contents About Wikipedia Edit links This page was last edited on 23 November 2017, at 05 : 03. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: the primary ethnic factional groups fighting each other in iraq after the invasion were
Answer: Arab Sunni