<a href="https://en.wikipedia.org/wiki/Isaac_II_Angelos" id="mwNg" rel="mw:WikiLink" title="Isaac II Angelos">Isaac II Angelos</a>, restored <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Byzantine_Emperor" id="mwNw" rel="mw:WikiLink" title="Byzantine Emperor">Byzantine Emperor</a>, declares his son <a href="https://en.wikipedia.org/wiki/Alexios_IV_Angelos" id="mwOA" rel="mw:WikiLink" title="Alexios IV Angelos">Alexios IV Angelos</a> co-emperor after pressure from the forces of the <a href="https://en.wikipedia.org/wiki/Fourth_Crusade" id="mwOQ" rel="mw:WikiLink" title="Fourth Crusade">Fourth Crusade</a>.