<p>The Battle of Wadi al-Khazandar (Battle of Homs) of 1299 (14th-century miniature)
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This is an early depiction of a "star and crescent" flag. It is important to note that various combinations of stars and crescents are shown in this manuscripts, and they are not consistently attributed to a particular faction (e.g. the Crusaders have a crescent flag on fol. 19v and a star flag on fol. 9v, and the Mongols have a star and crescent on fol. 22rv -- a secondary source is needed for a coherent discussion).
Unknown author<span style="display: none;">Unknown author</span>
BNF Nouvelle acquisition française 886, fol. 31v<a rel="nofollow" class="external autonumber" href="http://gallica.bnf.fr/ark:/12148/btv1b6000425w/f74.item">[1]</a>. This image is a scan of reproduction published in Claude Mutafian, <i> Le royaume arménien de Cilicie, XIIe ‑ XIVe siècle</i>, Paris, CNRS Éditions, 1993 (<a href="//commons.wikimedia.org/wiki/Special:BookSources/978-2271051059" title="Special:BookSources/978-2271051059">ISBN 978-2271051059</a>) (page needed).