Mosul Heavy fighting erupted here, the country’s second largest city, on June 7. By Tuesday, extremists had taken over. Thousands of civilians fled, south toward Baghdad and east toward the autonomous region of Kurdistan.

Baiji On Wednesday, ISIS fighters occupied facilities in this strategic oil refining town, including a power station that supplies electricity to Baghdad and Kirkuk.

Tikrit Also Wednesday, the militants seized this city, famous as the hometown of Saddam Hussein, with little resistance.