Unit Colour Patch of the Australian 5th Pioneer Battalion, 1916-19, First AIF. Reference: <a rel="nofollow" class="external text" href="https://web.archive.org/web/20091112051222/http://www.unsw.adfa.edu.au/~rmallett/Pioneers.html#Pioneer">Battalions</a>
<a href="//commons.wikimedia.org/wiki/User:AustralianRupert" title="User:AustralianRupert">AustralianRupert</a>
<span class="int-own-work" lang="en">Own work</span>