<a href="https://en.wikipedia.org/wiki/First_Fitna" id="mwEQ" rel="mw:WikiLink" title="First Fitna">First Fitna</a>: In the <a href="https://en.wikipedia.org/wiki/Battle_of_Siffin" id="mwEg" rel="mw:WikiLink" title="Battle of Siffin">Battle of Siffin</a>, troops led by <a href="https://en.wikipedia.org/wiki/Ali" id="mwEw" rel="mw:WikiLink" title="Ali">Ali ibn Abu Talib</a> clash with those led by <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Muawiyah_I" id="mwFA" rel="mw:WikiLink" title="Muawiyah I">Muawiyah I</a>.