Twenty years after the US-led invasion of Iraq toppled Saddam Hussein, the oil-rich country remains deeply scarred by the conflict and, while closer to the United States, far from the liberal democracy Washington had envisioned.
President George W. Bush's war, launched in the aftermath of the 9/11 attacks, is seared in memory for its "shock and awe" strikes, the toppling of a giant Saddam statue, and the years of bloody sectarian turmoil that followed.
The decision after the March 20, 2003 ground invasion to dismantle Iraq's state, party and military apparatus deepened the chaos that fuelled years of bloodletting, from which the jihadist Islamic State group later emerged.
"The US simply did not understand the nature of Iraqi society, the nature of the regime they were overthrowing," said Samuel Helfont, assistant professor of strategy at the Naval Postgraduate School in California.
Bush -- whose father had gone to war with Iraq in 1990-91 after Saddam's attack on Kuwait -- declared he wanted to impose "liberal democracy", but that drive petered out even if Saddam was overthrown quickly, Helfont said.
"Building democracy takes time and building a democracy doesn't create a utopia overnight," said Hamzeh Haddad, a visiting fellow at the European Council on Foreign Relations.
Major violence flared again in Iraq after the deadly February 2006 bombing of a Muslim Shiite shrine in Samarra north of Baghdad, which sparked a civil war that lasted two years.
By the time the US withdrew under Barack Obama in 2011, more than 100,000 Iraqi civilians had been killed, says the Iraq Body Count group. The United States claimed nearly 4,500 deaths on their side.
- Chaos and corruption -
Today some 2,500 US forces are based in Iraq -- not as occupiers, but in an advisory, non-combat role in the international coalition against IS, whose remnant cells continue to launch sporadic bombings and other attacks.
The years of violence have deeply altered society in Iraq, long home to a diverse mix of ethnic and religious groups. The minority Yazidis were targeted in what the UN called a genocidal campaign, and much of the once vibrant Christian community has been driven out.
Tensions also simmer between the Baghdad federal government and the autonomous Kurdish authority of northern Iraq, especially over oil exports.
Despite Iraq's immense oil and gas reserves, about one third of the population of 42 million lives in poverty, while some 35 percent of young people are unemployed, says the UN.
Politics remain chaotic, and parliament took a year, marred by post-election infighting, before it swore in a new government last October.
"Every Iraqi can tell you that corruption began to thrive ... in the 1990s" when Iraq was under international sanctions, said Haddad, adding that graft is more in focus now "because Iraq is open to the world".
Iraq is battered by other challenges, from its devastated infrastructure and daily power outages to water scarcity and the ravages of climate change.
And yet, said Haddad, today's Iraq is a "democratising state" which needs time to mature because "democracy is messy".
- Iran gains influence -
Iran and Iraq fought a protracted war in the 1980s, but the neighbours also have close cultural and religious ties as majority Shiite countries.
Iraq became a key economic lifeline for the Islamic republic as it was hit by sanctions over its contested nuclear programme, while Iran provides Iraq with gas and electricity as well as consumer goods.
Politically, Iraq's Shiite parties, freed from the yoke of Sunni dictator Saddam, have become "the most powerful players", says Hamdi Malik, associate fellow at the Washington Institute.
Iran-backed groups have managed to maintain a certain "cohesion" despite infighting after the last elections, he said, adding that "Iran is playing a crucial role" in making sure the cohesion lasts.
Pro-Iran parties dominate Iraq's parliament, and more than 150,000 fighters of the former Iran-backed Hashed al-Shaabi paramilitary forces have been integrated into the state military.
Baghdad must now manage relations with both Washington and Tehran, says a Western diplomat in Iraq speaking on condition of anonymity.
"It is trying to strike a balance in its relations with Iran, its Sunni neighbours and the West," the diplomat said. "It's a very delicate exercise."
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© Agence France-Presse
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