Halley's Comet was visible on 22 August 1531/Aug/05    34  1531/Aug/26 0.58   1531/Aug/14 0.44  1531/Aug/27  1 <br><a href="https://en.wikipedia.org/wiki/Battle_of_Obertyn" class="extiw" title="w:Battle of Obertyn">w:Battle of Obertyn</a> - Polish Hetman <a href="https://en.wikipedia.org/wiki/Jan_Tarnowski" class="extiw" title="w:Jan Tarnowski">w:Jan Tarnowski</a> led some 4,800 cavalry, 1,200 infantry and 12 cannon; they were protected inside a <i>tabor</i> (<a href="https://en.wikipedia.org/wiki/wagon-fort" class="extiw" title="w:wagon-fort">wagon-fort</a>). The Polish infantry and artillery is positioned in the corners, with 9 cannon visible.<br>The Moldavian Army, visible attacking the waggon fort, had 20,000 cavalry and 50 canons at the battle.
Unknown author<span style="display: none;">Unknown author</span>
Marcin Bielski's "Kronika Polska"