Re: &quot;light cavalry armies are useless against castles and fortified cities as the ones found in most of Europe&quot;<p>Not true, as the Chinese cities at the time were much more fortified than Europe. The Mongols were able to plunder the surrounding lands.<p>Also, despite Europe&#x27;s fortifications, a scouting party led by Subutai of 20,000 horse archers, widely wiped out a much more significant force of Central Europe soldiers, greatly outnumbering the Mongols. Fortified cities may cause trouble, but by this time, Mongol dominance had incorporated Chinese siege technology that fortified central european cities had not seen.