Most caste systems in our history were based on a person's skin color. I'm gonna take a guess that it would be the same for this part of the world.
The Treaty Of Versailles placed restrictions on how strong Germany could build its military and took away large portions of land that were taken during WW1. Loosing Lot of land right after obtaining it would make many citizens rather upset.
The answer is true. This because the colonies wanted to separate to become independent.