931st Civil Enginer Squadron emblem
<a href="https://en.wikipedia.org/wiki/United_States_Army_Institute_of_Heraldry" class="extiw" title="en:United States Army Institute of Heraldry">en:United States Army Institute of Heraldry</a>
2017-06-06
<a rel="nofollow" class="external free" href="https://media.defense.gov/2011/Oct/14/2000209749/-1/-1/0/111014-F-JZ018-770.JPG">https://media.defense.gov/2011/Oct/14/2000209749/-1/-1/0/111014-F-JZ018-770.JPG</a>