When the Crusades of the 12th century ended in failure, Westerners blamed Byzantine treachery rather than their own poor logistics and strategy. Distracted by the Crusades, meanwhile, Constantinople neglected the Seljuk threat and lost to the Turks again at Myriocephalon (1176). The fecklessness of a new and weak dynasty, the Angelans, left Byzantium's great capital vulnerable to Crusader assault.