collateral damage
noun [ U ] uk/kəˌlæt.ər.əl ˈdæm.ɪdʒ/ us/kəˌlæt̬.ɚ.əl ˈdæm.ɪdʒ/
（战争中的）附带性破坏，附带损害
during a war, the unintentional deaths and injuries of people who are not soldiers, and damage that is caused to their homes, hospitals, schools, etc.