Sarmatian warlords of what is now Serbia and Hungary were overlords to those who lived in what is now Poland ?
Let us focus our observation on Sarmatians located from South-Eastern Europe to Baltic, from what is now Serbia and Hungary to what is now Poland. We often ask ourselves, was there any common tribal organization and mutual alliance between, to say Polish and Serbian Sarmatians. Well, we do have some documents. If we accept old records that proving how Celts were in fact Sarmatians (ie Slavs), we know for the written sources that describing tribal alliance between Skordicsi (on the South-Eastern-Central Europe) and Boii (Northern-Eastern-Central Europe).
Now, you all heard about King Arthur (Arcturus Castus), right? See, he commanded to 5.500 Sarmatian warriors that were sent to Britain after Romans defeated Sarmatians in long war and forced them to pay tribute. In obligation, among else, Sarmatians had to give 5.500 warriors to Roman service. Now, modern genetic science confirmed that most of those 5.500 Sarmatian warriors which were sent to Britain have Polish genetics (let`s say, gene variation of Northern Sarmatians), only few of them genetics of Serbians (let`s say, gene variation of Southern Sarmatians). You would say, well, what about it, coincidence, nothing strange. But see, battlefields of those wars after Polish Sarmatians gave 5.000 their finest warriors as tribute to Romans, were predominantly around the Danube in what is now Serbia and Hungary, in the land of Sarmatian Iazyges. That issue belong to Marcomannic Wars, of great Sarmatian-Roman conflict.
I would give you even more data. Man who gave direct order, after got request from Roman Emperor Marcus Aurelius, for sending 5.500 Sarmatian warriors in Roman service was King Zanticus of Iazyges. He was desperate man. Casualties inflicted by Romans were tremendous and what he obviously did is to turn to tribes of more northern Sarmatians and asked them to give warriors as tribute, what they did, obeying to his demands. Obviously, Zanticus (probably- Santic and then Romanized in records as Zanticus) was important Sarmatian and Iazyges were overlord Sarmatian tribe to those Sarmatian tribes in what is now Poland. That is the only explanation for this situation, in which northern Sarmatians (not most directly involved in the war) gave warriors as tribute to the foe, on the demand from southern Sarmatian warlord.The Roman expedition against the Iazyges in the eastern Pannonian Plain and the great Marcomannic invasion, 167 - 170 ADThe Roman counter-offensive across the Danube, 171-175 AD