The city of <a href="https://en.wikipedia.org/wiki/Ryazan" id="mwKQ" rel="mw:WikiLink" title="Ryazan">Ryazan</a> is <a href="https://en.wikipedia.org/wiki/Siege_of_Ryazan" id="mwKg" rel="mw:WikiLink" title="Siege of Ryazan">sacked</a> by the <a href="https://en.wikipedia.org/wiki/Mongols" id="mwKw" rel="mw:WikiLink" title="Mongols">Mongol</a> army of <a href="https://en.wikipedia.org/wiki/Batu_Khan" id="mwLA" rel="mw:WikiLink" title="Batu Khan">Batu Khan</a>.<sup about="#mwt36" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-4"}}' id="cite_ref-4" rel="dc:references" typeof="mw:Extension/ref"><a href="./December_21#cite_note-4" id="mwLQ" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mwLg">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-4"><cite about="#mwt33" class="citation book cs1" id="CITEREFRachewiltzWang1993">Rachewiltz, Igor de; Wang, May (1993). <a class="external text" href="https://books.google.com/books?id=kG45gi7E3hsC&amp;pg=PA23" id="mwBcQ" rel="mw:ExtLink nofollow"><i id="mwBcU">In the Service of the Khan: Eminent Personalities of the Early Mongol-Yüan Period (1200-1300)</i></a>. Otto Harrassowitz Verlag. p.<span id="mwBcY" typeof="mw:Entity"> </span>23. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBcc" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBcg" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-3-447-03339-8" id="mwBck" rel="mw:WikiLink" title="Special:BookSources/978-3-447-03339-8"><bdi id="mwBco">978-3-447-03339-8</bdi></a>.</cite><span about="#mwt33" class="Z3988" id="mwBcs" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=In+the+Service+of+the+Khan%3A+Eminent+Personalities+of+the+Early+Mongol-Y%C3%BCan+Period+%281200-1300%29&amp;rft.pages=23&amp;rft.pub=Otto+Harrassowitz+Verlag&amp;rft.date=1993&amp;rft.isbn=978-3-447-03339-8&amp;rft.aulast=Rachewiltz&amp;rft.aufirst=Igor+de&amp;rft.au=Wang%2C+May&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DkG45gi7E3hsC%26pg%3DPA23&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ADecember+21"></span></span>