How does Rome React when....

[Berserker]

thanks to several butterflies and a POD from around 120 BC, a Scytho-Sarmatian Kingdom stretches from the Danube river and most land east of the Carpathians til the Caspian sea.

also, thanks to their recent raids, a large group of refugees fled across the Danube into Thrace.
the time this happens is 70 BC

in this TL Rome already posesses Syria, Armenia is still a reasonable empire and Pontus is ruled by Mithridates of Colchis ( the very son he had executed OTL, who ITTL betrayed him and sided with rome and Scytho-Sarmatia)

how would rome respond and react on such a kingdom on their borders???

 

[Anaxagoras]

They would support kings ruling buffer states between their own borders and the borders of this kingdom in question. When the Scytho-Sarmatians started messing with the client kingdoms, Rome would send out an army that would be heavily defeated. Thus pissed off, Rome would raise another army and march off to fight, defeating the Scytho-Sarmatians and forcing them to cede some territory (which at the same time annexing some of the client kingdoms in order to make sure they are well run).

Of course, the Scytho-Sarmatians would hunger for gear up for another round and launch an attack on the Romans a decade or so later. The Romans would lose the first battle, then raise another army and march off to defeat the Scytho-Sarmatians again.

Repeat until said Scytho-Sarmatian is utterly crushed.

 

[eliphas8]

They would support kings ruling buffer states between their own borders and the borders of this kingdom in question. When the Scytho-Sarmatians started messing with the client kingdoms, Rome would send out an army that would be heavily defeated. Thus pissed off, Rome would raise another army and march off to fight, defeating the Scytho-Sarmatians and forcing them to cede some territory (which at the same time annexing some of the client kingdoms in order to make sure they are well run).

Of course, the Scytho-Sarmatians would hunger for gear up for another round and launch an attack on the Romans a decade or so later. The Romans would lose the first battle, then raise another army and march off to defeat the Scytho-Sarmatians again.

Repeat until said Scytho-Sarmatian is utterly crushed.

So basically the exact same way they interacted with Parthia?

 

[Basileus Giorgios]

What Anaxagoras said, though this kingdom will be much weaker than Parthia as it doesn't have anything like the amount of resources. Most probably the Romans content themselves with beating up the Scytho-Sarmatians to grab the Crimea and the Danube frontier, and otherwise ignore them.