<a href="https://en.wikipedia.org/wiki/Battle_of_Achelous_(917)" id="mwIg" rel="mw:WikiLink" title="Battle of Achelous (917)">Battle of Acheloos</a>: Tsar <a href="https://en.wikipedia.org/wiki/Simeon_I_of_Bulgaria" id="mwIw" rel="mw:WikiLink" title="Simeon I of Bulgaria">Simeon I of Bulgaria</a> decisively defeats a <a href="https://en.wikipedia.org/wiki/Byzantine_Empire" id="mwJA" rel="mw:WikiLink" title="Byzantine Empire">Byzantine</a> army.