Balberta
... that the powerful Early Classic Mesoamerican city of Balberta, in Guatemala, abruptly collapsed around AD 400?
... that the powerful <a href="./Mesoamerican_chronology" id="mwDtU" rel="mw:WikiLink" title="Mesoamerican chronology">Early Classic</a> <a href="./Mesoamerica" id="mwDtY" rel="mw:WikiLink" title="Mesoamerica">Mesoamerican</a> city of <b id="mwDtc"><a href="./Balberta" id="mwDtg" rel="mw:WikiLink" title="Balberta">Balberta</a></b>, in <a href="./Guatemala" id="mwDtk" rel="mw:WikiLink" title="Guatemala">Guatemala</a>, abruptly collapsed around AD 400?