Boris V.
Boris V.

Croats and Serbs derive from Sarmatian tribes Harahwaiti and Serboi.
Russia and Ukraine are full of Sarmatian and Scynthian graves.
Poland even had Sarmatism ideology and also it many noble leaders claimed to be Sarmatian in origin.

I think it’s pretty evident Sarmatian warriors were a great factor in creation of Slavic states of today.