The emperor, Jean Zimisces, immediately entered into an alliance with the Bulgarians, offering his daughter in marriage to Boris, son of their former king.
A bloody war ensued.

The Greeks and Bulgarians were victors, and Sviatoslaf, almost gnashing his teeth with rage, was driven back again to the cold regions of the North.

The Greek historians give the following description of the personal appearance of Sviatoslaf.

He was of medium height and well formed.

His physiognomy was severe and stern.