Military map symbol for a neutral land unit or formation. Use of green and the square frame was introduced to identify neutral units in NATO's APP-6A standard.
<a href="//commons.wikimedia.org/wiki/User:CdnMCG" title="User:CdnMCG">CdnMCG</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>