The <a href="https://en.wikipedia.org/wiki/Battle_of_Dun_Nechtain" id="mwIg" rel="mw:WikiLink" title="Battle of Dun Nechtain">Battle of Dun Nechtain</a> is fought between a <a href="https://en.wikipedia.org/wiki/Picts" id="mwIw" rel="mw:WikiLink" title="Picts">Pictish</a> army under King <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Bridei_III" id="mwJA" rel="mw:WikiLink" title="Bridei III">Bridei III</a> and the invading <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Northumbrians" id="mwJQ" rel="mw:WikiLink" title="Northumbrians">Northumbrians</a> under King <a href="https://en.wikipedia.org/wiki/Ecgfrith_of_Northumbria" id="mwJg" rel="mw:WikiLink" title="Ecgfrith of Northumbria">Ecgfrith</a>, who are decisively defeated.