<a href="https://en.wikipedia.org/wiki/Battle_of_Clontarf" id="mwJg" rel="mw:WikiLink" title="Battle of Clontarf">Battle of Clontarf</a>: High King of Ireland <a href="https://en.wikipedia.org/wiki/Brian_Boru" id="mwJw" rel="mw:WikiLink" title="Brian Boru">Brian Boru</a> defeats <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Viking" id="mwKA" rel="mw:WikiLink" title="Viking">Viking</a> invaders, but is killed in battle.