Facts:   - death place: sava banks    - title: archon -lrb- ἄρχων -rrb-    - succession: prince of serbia    - caption: illustration    - reign: 927 -- 960 b    - successor: possibly tihomir c    - death date: 960 b    - predecessor: zaharija      - house: vlastimirović dynasty    - father: klonimir    - birth date: before 896    - name: Časlav    - image: Časlav crop.jpg    - birth place: preslav , bulgaria    - religion: eastern christianity   Based on these bullet points, write a short biography describing the life of Časlav .
The answer to this question is:
Časlav -lrb- , ; 890s -- 960 -rrb- was prince of the serbs from 927 until his death in 960 .he significantly expanded the serbian principality when he managed to unite several slavic tribes , stretching his realm over the shores of the adriatic sea , the sava river and the morava valley .he successfully fought off the magyars , who had crossed the carpathians and ravaged central europe , when they invaded bosnia .Časlav is remembered , alongside his predecessor vlastimir , as founders of serbia in the middle ages .Časlav was the son of klonimir , a son of strojimir who ruled as co-prince in 851 -- 880 .he belongs to the first serbian dynasty , the vlastimirovićs -lrb- ruling since the early 7th century -rrb- , and is the last known ruler of the family .