At least 169 people were killed and 21 more were wounded.
Hundreds of British troops will be deployed to Iraq in the coming weeks.
Finance Minister Hoshiyar Zebari said Iraq is seeking to defer its 1990-91 war reparation payments to Kuwait due to a financial crisis created by falling oil prices and a war against the Islamic State militants.
Christian Iraqis have formed their first militia, Doekh Nawsha, in the plains northeast of Mosul.
Militants fired rockets on the holy city of Karbala as millions of Shi’ite pilgrims are in the city for Arbaeen observances. One person was killed, and he was a resident of the city. At least four people were wounded.
In Ramadi, clashes left two policemen dead and two wounded. Eight militants were also killed. A family of 15 was killed in artillery fire. Fifteen militants were killed as they tried to rig a bomb truck.
Militants killed eight members of the Jesat tribe in Beiji.
Three people were killed and seven more were wounded in roadside bombings near Riyadh.
A mortar killed a civilian in Duluiya.
A sniper killed an officer in Buhriz.
Security operations in Garma and Sijariya left 35 militants dead.
In Baaj, 20 militants were killed.
Six militants were killed in Dijla.
Peshmerga forces killed dozens of militants on Mount Sinjar.