1. It overran much of the south in 2011.

2. Tikrit, a predominantly Sunni Arab city, was captured by IS militants when they overran much of northern and western Iraq in June 2014.

3. When it overran the cities of Mosul and Tikrit in June, Iraqi security forces virtually collapsed.

4. Yes, he was content under the rule of Islamic State, which overran the northern Iraqi city more than a year ago.

5. The men had been ordered to leave a UN compound run by Dutch peacekeeping forces when Bosnian Serb forces overran it.