Early in his reign he suppressed a revolt by the landowners of Asia Minor and reclaimed much of Syria.
He gave his sister Anna in marriage to Vladimir I of Kiev and received 6000 soldiers who formed the core of the Varangian guard.  Early in his reign he suppressed a revolt by the landowners of Asia Minor and reclaimed much of Syria. Though he was crowned his father's co-emperor when he was three, after Romanus II's death the empire was ruled by generals Nicephoras II Phocas and John I Tzimisces.  Most famous for ordering his prisoners to be blinded after the battle of Kleidion, this is, for 10 points, what Byzantine emperor whose dealings with Tsar Samuel of Bulgaria earned him a famous nickname?
He gave his sister Anna in marriage to Vladimir I of Kiev and received 6000 soldiers who formed the core of the Varangian guard.  
Basil II or Basil Bulgaroktonos or Basil Bulgar-Slayer