Pei Du
... that the Tang Dynasty chancellor/general Pei Du swore to Emperor Xianzong that he would not return to the capital Chang'an unless the warlord Wu Yuanji was destroyed?
... that the <a class="mw-redirect" href="./Tang_Dynasty" id="mwFx4" rel="mw:WikiLink" title="Tang Dynasty">Tang Dynasty</a> <a class="mw-redirect" href="./Chancellor_of_Tang_Dynasty" id="mwFx8" rel="mw:WikiLink" title="Chancellor of Tang Dynasty">chancellor</a>/<a href="./General_officer" id="mwFyA" rel="mw:WikiLink" title="General officer">general</a> <b id="mwFyE"><a href="./Pei_Du" id="mwFyI" rel="mw:WikiLink" title="Pei Du">Pei Du</a></b> swore to <a href="./Emperor_Xianzong_of_Tang" id="mwFyM" rel="mw:WikiLink" title="Emperor Xianzong of Tang">Emperor Xianzong</a> that he would not return to the capital <a href="./Chang'an" id="mwFyQ" rel="mw:WikiLink" title="Chang'an">Chang'an</a> unless the warlord <a href="./Wu_Yuanji" id="mwFyU" rel="mw:WikiLink" title="Wu Yuanji">Wu Yuanji</a> was destroyed?