Shoulder sleeve insignia of the III Corps.
<div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none"><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div>
<ul><li class="toclevel-1"><a href="#Summary"><span class="tocnumber">1</span> <span class="toctext">Summary</span></a></li>
<li class="toclevel-1"><a href="#Symbolism"><span class="tocnumber">2</span> <span class="toctext">Symbolism</span></a></li>
<li class="toclevel-1"><a href="#Background"><span class="tocnumber">3</span> <span class="toctext">Background</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="#Licensing"><span class="tocnumber">4</span> <span class="toctext">Licensing</span></a></li>
</ul></div>

<h2><span class="mw-headline" id="Summary">Summary</span></h2>
<p>A blue caltrop with three points that lie on a circle of 1 1/2 inch radius with a white triangle in the center with points that lie on a circle of 3/8 inch radius. The design is enclosed by a 1/8 inch Army green border. 
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<h2><span class="mw-headline" id="Symbolism">Symbolism</span></h2>
<p>The triangular design represents the numerical designation of the corps. The blue and white are the authorized colors used in distinguishing flags to represent corps.
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<h2><span class="mw-headline" id="Background">Background</span></h2>
The shoulder sleeve insignia was approved by the Adjutant General, American Expeditionary Force on December 3, 1918. It was approved by the War Department on June 17, 1922.
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