Susannah George:

Well, what we saw there at the end of February and early March was something that we'd seen happen a few other times in the Mosul operation, was, as Iraqi forces were looking to speed up the progress on the ground to retake the city, there was a spike in civilian casualties.

And most people know about it because of the March 17 coalition airstrike that resulted in more than 100 civilians dead. That's according to a Pentagon investigation into the incident.

And when reports of that incident began to surface in late March, the entire Mosul operation was put on hold for a few weeks. And coalition officials told us at that time that — and a diplomat who was present during those meetings told us at that time that they were looking to completely change the way that they were fighting the battle, because the cost on civilian lives was too great.

However, when we spoke to Iraqi officers on the ground who were actually leading the fight, they told us that they didn't receive any lasting change in guidelines of how to call in airstrikes or how to carry out the fight on the ground from their perspective.