After rioting by <a href="https://en.wikipedia.org/wiki/Baltimore_and_Ohio_Railroad" id="mwkw" rel="mw:WikiLink" title="Baltimore and Ohio Railroad">Baltimore and Ohio Railroad</a> workers and the <a href="https://en.wikipedia.org/wiki/Great_Railroad_Strike_of_1877" id="mwlA" rel="mw:WikiLink" title="Great Railroad Strike of 1877">deaths of nine rail workers</a> at the hands of the <a href="https://en.wikipedia.org/wiki/Maryland" id="mwlQ" rel="mw:WikiLink" title="Maryland">Maryland</a> militia, workers in <a href="https://en.wikipedia.org/wiki/Pittsburgh" id="mwlg" rel="mw:WikiLink" title="Pittsburgh">Pittsburgh, Pennsylvania</a>, stage a <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Sympathy_strike" id="mwlw" rel="mw:WikiLink" title="Sympathy strike">sympathy strike</a> that is met with an assault by the state militia.