Eagles of the Polish Legions in World War I (Austria-Hungary) used since 1916.
image taken by <a href="//commons.wikimedia.org/wiki/User:Mathiasrex" title="User:Mathiasrex">Mathiasrex</a> Maciej Szczepańczyk
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>