Turkey also launched airstrikes in Iraq.

A mass grave containing ISIS officials was found.

ISIS staged small attacks.

Soldiers were killed in an attack in Diyala.

Casualties in 2018 are significantly lower than in 2017.

The monthly tally of casualties was lower in December.

A mass grave dating to the Islamic State invasion was found in the Hawija area.

Several small attacks left casualties.

Attacks against security personnel left six dead.

Two dozen people were kidnapped from three locations in northern Iraq. Also, a vehicle bombing targeted a Turkmen city.