<a href="https://en.wikipedia.org/wiki/World_War_I" id="mwfA" rel="mw:WikiLink" title="World War I">World War I</a>: The <a href="https://en.wikipedia.org/wiki/Battle_of_Polygon_Wood" id="mwfQ" rel="mw:WikiLink" title="Battle of Polygon Wood">Battle of Polygon Wood</a> begins.