Comparing Outcasts vs Corsairs to what actually happened in the Spanish Civil War is so wrong I don't know where to start.
Anyway, your theory falls short. There were no matriarchs in Imperial Japan, the British have been losing territories since long before the 1930s, Nazi Germany utterly destroyed every left wing movement against it (as opposed to the healthy number in Rheinland), and there were small left wing movements during the depression era US, not to mention many people actually went to the Soviet Union looking for work.
As I said, I'm trying to bring variety to Liberty aside from cops versus robbers.