Iraq’s prime minister says the country's population has grown to 45.4 million, according to preliminary results from a national census, the first in nearly 40 years

Declassified 1970s-era U.S. spy satellite imagery has led a British-Iraqi archeological team to what they believe is the site of a seventh-century battle that became decisive in the spread of Islam throughout the region

Two U.S. service members were injured overnight in a raid in Iraq that targeted top ISIS leaders and killed "multiple" ISIS operatives, the Pentagon said Tuesday.

A memorial to fallen journalists killed during the war to remove Saddam Hussein from power in Iraq was inaugurated in the northern Iraqi city of Sulaymaniyah.

U.S. and Iraq announce end of anti-ISIS coalition troop presence in Iraq could mean significant troop reduction in Iraq.

Seven U.S. personnel injured in Iraq raid that killed 15 ISIS members, officials said.

Several American service members were injured after two missiles were launched at Al-Asad Airbase, officials said.

A "post-attack damage assessment" was being conducted, a spokesperson said.

The U.S. military conducted a defensive airstrike south of Baghdad, Iraq, on Tuesday, according to two U.S. officials.

A deadly explosion struck a military base in Iraq. The U.S. is denying any involvement and Israeli military forces are not commenting.

ABC News’ Martha Raddatz reunites with soldiers who fought in the Sadr City ambush on “This Week.”

The U.S. carried out an airstrike in Baghdad on Wednesday targeting a leader of an Iran-backed militia in Iraq that was blamed for attacks on U.S. forces

The U.S. hit 85 targets after a drone attack killed three U.S. service members.

Some 2,500 U.S. troops remain inside Iraq to counter ISIS, Iran-backed militias.

Iran's foreign minister says the threat of a wider conflict will remain if the U.S. continues to back Israel.

U.S. personnel suffered brain injuries in a ballistic missile attack Sunday.

The airstrikes are in retaliation to an attack targeting Al-Assad Airbase by Iranian-backed militia this past weekend.

A top White House official says the administration is taking the incident very seriously and several service personnel are being evaluated for brain injuries.

A large missile barrage on a U.S. base in Iraq has left some U.S. personnel being evaluated for traumatic brain injuries, officials said.

U.S. officials condemned the strikes, saying that the "initial indications are that this was a reckless and imprecise set of strikes."

Several explosions were reported near the U.S. Consulate in Erbil, Iraq, an Iraqi security source told ABC News.

ABC News’ Juju Chang spoke with former Deputy Assistant Secretary of Defense for the Middle East Mick Mulroy on the airstrikes made by the U.S. Military in Iraq.

U.S. military forces carried out airstrikes on facilities in Iraq used by Kataib Hezbollah and its affiliates on Christmas night, the Department of Defense said.

ABC News contributor Darrell Blocker breaks down what the U.S.’s retaliatory attacks on Iran-backed forces mean for growing tensions in the region.

The White House says President Joe Biden personally ordered strikes on Christmas night that targeted locations tied to the Hezbollah Brigades group.

The Pentagon says the militants were about to target American forces with a drone attack.

ABC News’ Bob Woodruff has dreamed of revisiting the country where he nearly lost everything.

Bob Woodruff’s life was changed forever when he was struck by a roadside bomb while covering the 2006 conflict for ABC News.

ABC News’ Bob Woodruff talks about his journey back to Iraq 18 years after he was in a convoy that struck an IED and his path to healing.

Attacks on American troops in Middle East continue.

Fire expert highlights safety issues that led to deadly Iraq wedding blaze, as government investigation angers often-neglected region of Ninevah

Survivors said the fire began about an hour into the event when flares ignited a ceiling decoration as the bride and groom danced.

Elizabeth Tsurkov, an Israeli-Russian dual citizen and Princeton University graduate student, has been held captive for months by an Iran-linked Shiite militia in Iraq.

The legislation now goes to the House, where its fate is uncertain.

Rep. Dan Crenshaw and Sen. Tammy Duckworth reflect on their military service in Iraq on the 20th anniversary of the U.S. invasion there

Martha Raddatz interviews veterans Sen. Tammy Duckworth, D-Ill., and Rep. Dan Crenshaw, R-Texas., as we near the 20th anniversary of the Iraq War on “This Week.”

"It really bothers me that they threw me away that way," he told ABC News.

"It really bothers me that they threw me away that way," he told ABC News.

Veterans reflect on their Iraq War deployments 20 years later.

Byron Pitts spoke with retired four-star General David Petraeus about the 20th anniversary of the invasion of Iraq.

Byron Pitts speaks with retired four-star General David Petraeus about the 20th anniversary of the invasion of Iraq.

Twenty years after they were first deployed to Iraq, three Marines speak candidly about their experiences and the lasting toll of the war.

ABC News' Stephanie Ramos looks back on her time serving in Iraq, joining a group of service members reflecting on their experience and sacrifices during the Iraq War 20 years after the U.S. invasion.

ABC News' Linsey Davis spoke with Pulitzer Prize-winning photojournalist Lynsey Addario about her experience covering the Iraq War 20 years after the U.S. invasion.

An American aid worker was gunned down in Baghdad on Monday, officials said.

The U.S. Embassy and other parts of the Green Zone in Baghdad were attacked by "terrorist groups" Thursday.

Mustafa al-Kadhimi was reportedly targeted by a drone directed to his residence. The government said the prime minister was not harmed in the attempt.

In a historic bipartisan move, a Senate panel has voted to scrap both Iraq war authorizations.

During a meeting with Iraqi Prime Minister Mustafa Al-Kadhimi, President Joe Biden said the U.S. is "not going to be, by the end of the year, in a combat mission" in Iraq.

President Joe Biden said the U.S. is "not going to be, by the end of the year, in a combat mission" in Iraq.