CHRONOLOGY-The deadliest bomb attacks in Iraq

(Reuters) - Bomb attacks at crowded markets in central Baghdad killed at least 76 people on Monday as Iraqis marked the first anniversary of a Shi'ite shrine bombing that pitched the country to the brink of civil war.

Here is a list of some of the deadliest bomb attacks in Iraq since the overthrow of Saddam Hussein in 2003:

August 19, 2003 - A truck bomb wrecks UN headquarters in Baghdad, killing 22 people, including UN envoy Sergio Vieira de Mello.

August 29, 2003 - A car bomb kills at least 83 people, including Shi'ite Muslim leader Ayatollah Mohammed Baqer al-Hakim, at the Imam Ali mosque in Najaf.

February 1, 2004 - 117 people are killed when two suicide bombers blow themselves up in Arbil at the offices of the two main Kurdish factions in northern Iraq.

February 10, 2004 - Suicide car bomb rips through a police station in Iskandariya, south of Baghdad, killing 53.

February 11, 2004 - Suicide car bomb explodes at an Iraqi army recruitment center in Baghdad, killing 47.

March 2, 2004 - 171 people are killed in twin attacks in Baghdad and Kerbala.

December 19, 2004 - A suicide car bomb blast in Najaf, 300 meters from the Imam Ali shrine, kills 52 and wounds 140.

February 28, 2005 - A suicide car bomb attack in Hilla, south of Baghdad, kills 125 people and wounds 130.

July 16, 2005 - A suicide bomber in a fuel truck near a Shi'ite mosque in the town of Mussayib, near Kerbala, kills 98.

September 14, 2005 - A suicide bomber kills 114 people and wounds 156 in a Shi'ite district of Baghdad.

September 29, 2005 - 98 people are killed in three coordinated car bomb attacks in the mixed Shi'ite and Sunni town of Balad.

November 18, 2005 - At least 74 people are killed and 150 wounded when suicide bombers blow themselves up inside two Shi'ite mosques in Khanaqin.

January 5, 2006 - Two suicide bombers kill over 120 people and wound more than 200 in the cities of Kerbala and Ramadi. Fifty-three were killed and 148 wounded in Kerbala and 70 killed and 65 wounded in Ramadi.

July 1, 2006 - A car bomb attack at a crowded market in Sadr city, a Shi'ite district of eastern Baghdad, kills 62 and wounds 114. The Supporters of the Sunni People, a previously unknown Iraqi Sunni Muslim group, claims responsibility.