Several nations faced severe gender imbalance in the aftermath of WWI and WWII. How did the increased rates of unmarried women affect gender roles and culture in those countries?

by Dtnoip30

The situation in each country was probably different, so I would appreciate an answer for a particular country or region.

unused_doorbell

In particular, I would like to know how the loss of males from the Soviet Union and Tsarist Russia affected the social makeup of the population.