Investigators traveled to Raqqa and spoke with more than 100 witnesses and victims, with their report highlighting the deaths of dozens of members of just four families.
Civilian fatalities from international military actions in both Iraq and Syria were at record low levels during April.
After nearly four years of strikes the UK has finally admitted to a single civilian casualty
Thousands of civilians were killed during the battle for Mosul, but there is no official death toll.
Australia remains the only American ally to admit any civilian harm after almost four years of strikes
Civilian deaths from Coalition actions were up by more than 200% in 2017, as the war against ISIS pushed deep into cities
With ISIS mostly defeated, Airwars tracked a major fall in reported Coalition civilian casualties in November. Russia remains a problem.
Iraqi forces supported by the international Coalition have driven so-called Islamic State from the nation’s cities and towns. The cost in lives has been significant.