Certificate of inscription at <a href="https://en.wikipedia.org/wiki/Von_Bissing_university" class="extiw" title="w:Von Bissing university">Von Bissing University</a>. From the <a href="https://en.wikipedia.org/wiki/Royal_Museum_of_the_Armed_Forces_and_Military_History" class="extiw" title="w:Royal Museum of the Armed Forces and Military History">Royal Museum of the Armed Forces and Military History</a>, Brussels.
<a href="//commons.wikimedia.org/wiki/User:Brigade_Piron" title="User:Brigade Piron">Brigade Piron</a>
<span class="int-own-work" lang="en">Own work</span>