under siege
... that Baghdad was under siege for more than a year during a civil war in the 9th century between Al-Amin and his brother Al-Ma'mun for the Abbasid Caliphate?
... that <a href="./Baghdad" id="mwAoI" rel="mw:WikiLink" title="Baghdad">Baghdad</a> was <b id="mwAoM"><a class="mw-redirect" href="./Siege_of_Baghdad_(812-813)" id="mwAoQ" rel="mw:WikiLink" title="Siege of Baghdad (812-813)">under siege</a></b> for more than a year during a civil war in the 9th century between <a href="./Al-Amin" id="mwAoU" rel="mw:WikiLink" title="Al-Amin">Al-Amin</a> and his brother <a href="./Al-Ma'mun" id="mwAoY" rel="mw:WikiLink" title="Al-Ma'mun">Al-Ma'mun</a> for the <a href="./Abbasid_Caliphate" id="mwAoc" rel="mw:WikiLink" title="Abbasid Caliphate">Abbasid Caliphate</a>?