i'm not from ny nor am i slavic (that i know of) but i have spent a lot of time in russia and ukraine    by this time there was already a ton of slavic admixture. you have to go back to milograd culture and zarubintsy culture. btw i don't think this is a bad thing that rus inter-bred with belarussians, just a fact that balts were on the land before slavs.
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