March 3 (Reuters) - Mahmoud Ahmadinejad is visiting Iraq, the first Iranian president to do so since the two neighbours fought a war in the 1980s in which 1 million people were killed. Tehran's influence over Baghdad has grown since the U.S.-led invasion toppled Iran's long-time enemy Saddam Hussein in 2003. Following are details about relations in the past 30 years: * IRAN-IRAQ WAR: -- September 1980 - Iraq accused Iran of shelling Iraqi border towns from territory belonging to Baghdad under the 1975 Algiers accord on the frontier line and Shatt al-Arab waterway. Saddam Hussein tore up the accord and his troops invaded Iran. -- March 1988 - Iran seized the town of Halabja in northeast Iraq. Tehran said Iraq used chemical weapons to punish inhabitants for not resisting. About 5,000 people were killed. -- August 1988 - The Middle East's longest armed conflict in modern times ended with a U.N.-sponsored ceasefire. About one million people were killed in a conflict which involved trench warfare, chemical attacks and mass Iranian frontal assaults. * GULF WAR: -- August 1990 - Iraq invaded Kuwait. Days later Saddam told Iran he would withdraw from occupied Iranian territory and formally settle the 1980-88 war. -- January 1991 - Iraq flew more than 140 aircraft to Iran to avoid their destruction before a U.S.-led attack to force Iraqi troops out of Kuwait. Iraq's air force commander said in 2007 he hoped Iran would return some Iraqi warplanes. * IMPROVING TIES -- 1998 - Iran's moderate president, Mohammad Khatami, broke a logjam in ties, leading to swapping more prisoners from the 1980-88 war and relaunching pilgrimages by Iranians to holy Shi'ite Muslim sites in Iraq. -- 2003 - Iran-Iraq ties improve after Saddam was toppled. An Iraqi government led by Shi'ite Muslims came to power. Iran is a Shi'ite nation. -- The U.S. military has accused Iran of stoking violence in Iraq by funding, training and equipping militias. Iran denies this, blaming the presence of U.S. troops for the violence. -- More recently Iran may have used its influence with Iraqi Shi'ite militias to help reduce violence as a concession to Washington when Tehran was worried about a U.S. threat to resort to force to deal with a standoff over its nuclear programme. -- Iraq has also credited Tehran with helping to rein in the Mehdi Army militia of Shi'ite cleric Moqtada al-Sadr. * EXILES: -- 1978 - Ayatollah Ruhollah Khomeini spent several years in exile in the Iraqi city of Najaf before launching Iran's 1979 Islamic revolution that rattled the Sunni-dominated Arab world. -- Several Iraqi politicians spent years in exile in Iran when Saddam was in power, including the head of Iraq's biggest Shi'ite party, Abdul Aziz al-Hakim, and Jalal Talabani, a Kurd who is now the Iraqi president. (Writing by David Cutler, London Editorial Reference Unit)
Iraq's Prime Minister Nuri al-Maliki (R) shakes hands with Iran's President Mahmoud Ahmadinejad (L) in Baghdad March 2, 2008. Ahmadinejad arrived in Baghdad on Sunday, the first Iranian president to visit ...
