<a href="https://en.wikipedia.org/wiki/Regina,_Saskatchewan" id="mwAVw" rel="mw:WikiLink" title="Regina, Saskatchewan">Regina, Saskatchewan</a>, police and <a href="https://en.wikipedia.org/wiki/Royal_Canadian_Mounted_Police" id="mwAV0" rel="mw:WikiLink" title="Royal Canadian Mounted Police">Royal Canadian Mounted Police</a> ambush strikers participating in the <a href="https://en.wikipedia.org/wiki/On-to-Ottawa_Trek" id="mwAV4" rel="mw:WikiLink" title="On-to-Ottawa Trek">On-to-Ottawa Trek</a>.