Greater Vocabulary for Greater World Power!
collateral damage — Unintentional or incidental injury or damage to persons or objects that would not be lawful military targets in the circumstances ruling at the time. Such damage is not unlawful so long as it is not excessive in light of the overall military advantage anticipated from the attack—page 93 [New entry; added January 23, 2002]
(A tip of the cap to Steven Aftergood of the Federation of American Scientists for posting the recently revised Department of Defense official dictionary. Check out the invaluable FAS Project on Government Secrecy.)