Might be a small data problem.  This battle is showing up in downtown Toronto<p><a href="http:&#x2F;&#x2F;dbpedia.org&#x2F;page&#x2F;Battle_of_Hiep_Hoa" rel="nofollow">http:&#x2F;&#x2F;dbpedia.org&#x2F;page&#x2F;Battle_of_Hiep_Hoa</a><p>I was surprised to see one there in the after 1946 category.  Nice job overall though.  It&#x27;s always incredible to see visualizations like this.