Why is Our Lady of Victory named after Mary Mother of God?

By the middle of the 16th century the Muslims had invaded much of what is called Western Europe, and were approaching Vienna and the nations of Europe joined forces to repel the invaders and the Muslims were decisively defeated at the sea battle of Lepanto in 1572. The victors ascribed their success to the interecession of the Virgin Mary whose help they had implored through the Rosary. Pope Pius V instituted a new Catholic feast day of Our Lady of Victory, which is now celebrated by the as the feast of Our Lady of the Rosary on 7th of October. Today, Catholics see the title Our Lady of Victory (Our Lady of Victories) in non-militaristic terms, but as being a sign that eventually good will triumph over evil, love over hate, joy over sorrow and life over death. Related Link: http://en.wikipedia.org/wiki/Our_Lady_of_the_Rosary