The U.S.-led coalition and the axis of Russia, Iran and Syria both claim Iraq as an ally—and Baghdad may be the key to bringing them together.
The U.S. gained an ally in Baghdad after overthrowing Saddam Hussein in 2003, but an alliance of Iran, Iraq, Russia and Syria is growing stronger.
Fifteen years after the fall of Baghdad, Iraq has reportedly killed one of ISIS chief Abu Bakr al-Baghdadi's top men.
Groups the U.S. is considering labeling terrorist organizations have officially become part of the Iraqi military that Washington sponsors.
The Iraqi prime minister rejected the Kurdish vote for independence and parliament has given him military power to oppose it.
An Iraqi military commander told local media that his forces killed four ISIS suicide bombers, but a fifth got away and slaughtered a family.
Majority-Shiite Muslim neighbors Iran and Iraq have a volatile history and differing views on the U.S., but they share an interest in battling jihadis.
Despite being largely defeated in its former Iraqi stronghold of Mosul, the Islamic State militant group is still gaining territory amid new clashes.
Facing near-total defeat in its former stronghold of Mosul, the Islamic State militant group has launched a new, deadly offensive in Iraq.
The Iraqi army's chief of staff said the Islamic State group (ISIS) only controlled 3.8 percent of Iraq.
Troops attack militants in Hammam al-Alil, while special forces fight inside Mosul's eastern districts.
Experts say the only truly vital fighting force is the Iraqi Special Forces, who have been fighting ISIS for two years.
A Kurdish-Iraqi air force general will reportedly replace Iraq's top military chief as Iraqi prime minister Haider al-Abadi shakes up his ISIS strategy.
Three militants disguised in military uniform killed at least eight people in a local government office in Amiriyat al-Falluja in western Iraq.
Iraq's oil minister announced the formation of a defensive unit to protect oil reserves and infrastructure from the militant group.
After suffering a major defeat this month when Iraqi troops and Shi'ite paramilitaries routed them from the city of Tikrit, ISIS is striking back at the Baiji refinery and in the western province of Anbar.
Security forces sought to reverse an early setback in a new campaign to recapture the country's Sunni heartland.
As many as 1,700 bodies could be recovered from the site of the killings near the recently liberated city of Tikrit in northern Iraq.
Senior U.S. military officials want Baghdad to name an Iraqi commander for the offensive to avoid dealing with Iranian advisers.
A U.S. general who oversaw the training of Iraqi soldiers is worried about the battle against the Islamic State in Tikrit and Mosul.
Iraqi PM Al-Abadi offers pardon for all Sunni tribal fighters who abandon ISIS.