Collateral damage
"Collateral damage" is a term for any incidental and undesired death, injury or other damage inflicted, especially on civilians, as the result of an activity. Originally coined to describe military operations, it is now also used in non-military contexts to refer to negative unintended consequences of an action.
Critics of use of the term "collateral damage" see it as a euphemism that dehumanizes non-combatants killed or injured during combat, used to reduce the perceived culpability of military leadership in failing to prevent non-combatant casualties.
Collateral damage does not include civilian casualties caused by military operations that are intended to terrorize or kill enemy civilians (e.g., the Bombing of Dresden or Bombing of Hamburg in World War II and Russian strikes against Ukrainian infrastructure openly described as "retaliatory" and intended to "make towns uninhabitable").