This section covers the incidents people reach for when they argue about civilian deaths in war. Each has its own page with what happened, how many died, what the official account said, and what happened to anyone responsible.
One distinction runs through all of it and is worth stating before you start. Collateral damage and massacre are not the same thing. Some of these were incidental harm during an attack on a target the attacker believed was lawful. Others were the deliberate killing of people known to be civilians. Collapsing the two flatters the second and libels the first, so every page here says which it is and why. The difference is set out here.