Hungary, Romania, others separate the slavic-speaking south from the rest of the Slavic speaking world. How did that happen?
It's to hard to Google. I tried. http://www.utexas.edu/cola/centers/lrc/general/ie-lg/Balto-Slavic.html
Here is the synopsis: Hungarians were driven westward to conquest across modern Hungary which was previously Slavic speaking Moravia. It was conquered around 900 AD.
http://en.wikipedia.org/wiki/Hungarian_conquest_of_the_Carpathian_Basin#Consequences
The Magyar invaded rather late in the game.
And here is the synopsis:
The Hungarians settled in the lowlands of the Carpathian Basin along the rivers Danube, Tisza and their tributaries,[254] where they could continue their semi-nomadic lifestyle.[255] As an immediate consequence, their arrival "drove a non-Slavic wedge between the West Slavs and South Slavs" (Fine).[189] Fine argues that the Hungarians' departure from the western regions of the Pontic steppes weakened their former allies, the Khazars, which contributed to the collapse of the Khazar Empire.[189]
http://en.wikipedia.org/wiki/Hungarian_conquest_of_the_Carpathian_Basin#Consequences
