Islamic State leader Abu Bakr al-Baghdadi was assassinated in 2019.

US forces also assassinated Baghdadi.

His death was a blow to ISIS, but didn't cripple it. According to Brookings, Baghdadi's death put the terrorist group on the defensive, meaning it had to focus on its survival rather than conducting more terrorist attacks.

Like Osama Bin Laden, this was another successful assassination for the US since Baghdadi had no ties to a recognized state, Iain King wrote for NBC.