World War II: <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Invasion_of_Normandy" id="mw3w" rel="mw:WikiLink" title="Invasion of Normandy">Battle of Normandy</a>: At <a href="https://en.wikipedia.org/wiki/Ardenne_Abbey" id="mw4A" rel="mw:WikiLink" title="Ardenne Abbey">Ardenne Abbey</a>, members of the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/SS_Division_Hitlerjugend" id="mw4Q" rel="mw:WikiLink" title="SS Division Hitlerjugend">SS Division Hitlerjugend</a> <a href="https://en.wikipedia.org/wiki/Ardenne_Abbey_massacre" id="mw4g" rel="mw:WikiLink" title="Ardenne Abbey massacre">massacre</a> 23 Canadian <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Prisoners_of_war" id="mw4w" rel="mw:WikiLink" title="Prisoners of war">prisoners of war</a>.