Yanmen Commandery
... that in the mid-3rd century BC, the governor of Zhao's Yanmen Commandery lured 100,000 nomad horsemen over the Great Wall before defeating them?
... that in the mid-3rd century<span about="#mwt62" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"nbsp","href":"./Template:Nbsp"},"params":{},"i":0}}]}' id="mwBPo" typeof="mw:Transclusion"><span typeof="mw:Entity"> </span></span>BC, the governor of Zhao's <b id="mwBPs"><a href="./Yanmen_Commandery" id="mwBPw" rel="mw:WikiLink" title="Yanmen Commandery">Yanmen Commandery</a></b> lured 100,000 nomad horsemen over the Great Wall before defeating them?