Husayn ibn Hamdan
... that during the attempted overthrow of the Abbasid Caliph al-Muqtadir in 908, Husayn ibn Hamdan killed the vizier, but failed to force the Caliph to surrender, leading to the coup's collapse?
... that during the attempted overthrow of the <a class="mw-redirect" href="./Abbasid" id="mwCRs" rel="mw:WikiLink" title="Abbasid">Abbasid</a> Caliph <a href="./Al-Muqtadir" id="mwCRw" rel="mw:WikiLink" title="Al-Muqtadir">al-Muqtadir</a> in 908, <b id="mwCR0"><a href="./Husayn_ibn_Hamdan" id="mwCR4" rel="mw:WikiLink" title="Husayn ibn Hamdan">Husayn ibn Hamdan</a></b> killed the <a href="./Vizier" id="mwCR8" rel="mw:WikiLink" title="Vizier">vizier</a>, but failed to force the Caliph to surrender, leading to the coup's collapse?