<a href="https://en.wikipedia.org/wiki/Lattimer_massacre" id="mwXw" rel="mw:WikiLink" title="Lattimer massacre">Lattimer massacre</a>: A <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Posse_comitatus_(common_law)" id="mwYA" rel="mw:WikiLink" title="Posse comitatus (common law)">sheriff's posse</a> kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.