World War II: <a href="https://en.wikipedia.org/wiki/Operation_Carthage" id="mwug" rel="mw:WikiLink" title="Operation Carthage">Operation Carthage</a>: <a href="https://en.wikipedia.org/wiki/Royal_Air_Force" id="mwuw" rel="mw:WikiLink" title="Royal Air Force">Royal Air Force</a> planes bomb <a href="https://en.wikipedia.org/wiki/Gestapo" id="mwvA" rel="mw:WikiLink" title="Gestapo">Gestapo</a> headquarters in <a href="https://en.wikipedia.org/wiki/Copenhagen" id="mwvQ" rel="mw:WikiLink" title="Copenhagen">Copenhagen</a>, Denmark. They also accidentally hit a school, killing 125 civilians.