At least 50,000 IS fighters killed in Iraq, Syria since 2014:

At least 50,000 Islamic State jihadists have been killed by the US-led coalition since it began operations in Iraq and Syria in late 2014, a senior US military official said today.
"I am not into morbid counts but that kind of volume matters, that kind of impact on the enemy," the official said, calling the 50,000 number a "conservative estimate.