Khanaqin saw no fighting during World War II but became an important base for Commonwealth forces and a field hospital was constructed in the town. Many Polish prisoners of war, who escaped Russia and attempted to link up with Commonwealth forces in Khanaqin, arrived at the town in September 1942. They would remain in the town but many perished and a cemetery was built in the town for them. Maintenance of the Khanaqin War Cemetery was later abandoned and a memorial was built in Baghdad. In 2020, the cemetery was damaged by 'extremists'.