Second Navy Jack of the Confederate States.
<a href="https://en.wikipedia.org/wiki/William_Porcher_Miles" class="extiw" title="w:William Porcher Miles">William Porcher Miles (1822-1899)</a>
1863
SVG adapted from <a rel="nofollow" class="external text" href="http://www.civilwar.com/resources/313-flags/150182-confederate-flag-history.html">this image</a>