Hitler and Stalin hung around the same social groups and coffee houses in Vienna in the 1920's. They almost certainly knew each other personally, and likely even shared a few espressos with each other.

This probably contributes to why Stalin allowed Hitler to practice Blitzkrieg tactics in Siberia out of the peering eyes of British intelligence.

Hitler and Stalin hung around the same social groups and coffee houses in Vienna in the 1920's. They almost certainly knew each other personally, and likely even shared a few espressos with each other.

This is probably why Stalin allowed Hitler to practice Blitzkrieg tactics in Siberia out of the peering eyes of British intelligence.

Hitler and Stalin hung around the same social groups and coffee houses in Vienna in the 1920's. The almost certainly knew each other personally, and likely even shared a few espressos with each other.

This is probably why Stalin allowed Hitler to practice Blitzkrieg tactics in Siberia out of the peering eyes of British intelligence.