<a href="https://en.wikipedia.org/wiki/Baruch_Steinberg" class="extiw" title="en:Baruch Steinberg">Baruch Steinberg</a> (1897-1940). Chief Rabbi of the Polish Army, during German invasion of Poland in 1939. He was murdered in the Katyn massacre by the Soviet NKVD in April 1940.
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<a href="https://pl.wikipedia.org/wiki/Centralne_Archiwum_Wojskowe" class="extiw" title="pl:Centralne Archiwum Wojskowe">Centralne Archiwum Wojskowe</a>