As a result , they were unable to halt the quick advance of the Seljuk Turks in Asia Minor .
During the first half of the 11th century , the Byzantines faced little danger in the East , and allowed their military strength to weaken .
Byzantines were unable to halt the quick advance of the Seljuk Turks in Asia Minor .
During the first half of the 11th century , the Byzantines faced little danger in the East , and allowed their military strength to weaken .