What are These WEIRD Russian Flags in Ukraine??

What are these flags that Russian troops are waving in Ukraine?

It seems that Russian soldiers are still proud of their heritage, not only the one of the Soviet Union, but surprisingly also the one of past centuries with Imperial Russia.
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Follow up with the latest Ukraine Updates
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Watch Ep 11: https://youtu.be/J524iqOg9Vk
Watch Ep 10: https://youtu.be/XTuI-IjVd20
Watch Ep 9: https://youtu.be/6MX_G5RWmsE
Watch EP 8: https://youtu.be/GcPN_HsKDLU
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