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18 months
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30 seconds
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24 hours
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1 minute
Spellbound says
The Volga Germans did tend to marry within their ethnic group. They were largely Lutherans and were surrounded by Russian Orthodox Russians and Muslim Tatars and Kazakhs. They maintained their language, religion (mostly), cultural and ethnic differences with the neighbouring populations.
They were encouraged into the area by Tsar Catherine the Great to open up the (newly conquered) area to farming and commerce. In the early Soviet period they had their own Autonomous Soviet Socialist Republic – and were brutally suppressed during the course of WWII, as they were suspected of sympathising with the Nazi invaders. Before the Germans invaded the Nazis also encourage many to move to the conquered areas of Poland where they were given the homes of Jews who had been forced into the ghettos.
See:
The Nationalities Question in the Post-Soviet States – Graham Smith