Little more precize about Soviet cipher braking. It was a group of mathematicians, not just smart soldiers. https://en.m.wikipedia.org/wiki/Polish%E2%80%93Sovi

Little more precize about Soviet cipher braking. It was a group of mathematicians, not just smart soldiers. https://en.m.wikipedia.org/wiki/Polish%E2%80%93Soviet_War#Polish_intelligence https://en.m.wikipedia.org/wiki/Polish%E2%80%93Soviet_War#Po...